Oona Gray Seppala is the eldest daughter of American actress Sarah Rafferty and Santtu Seppälä. Born in 2007, she grew up around entertainment while enjoying a quiet and balanced childhood.
She became known because her mother played Donna Paulsen in the popular television series Suits. Sarah’s worldwide popularity naturally created interest in Oona, her younger sister, and their family life.
This article explores Oona Gray Seppala’s age, birthday, early life, parents, sister, education, childhood, connection with Suits, personal life, interests, relationship with her family, and possible future direction.
Who Is Oona Gray Seppala?
Oona Gray Seppala is the first daughter of actress Sarah Rafferty and Santtu Seppälä. She was born on October 22, 2007, and grew up alongside her younger sister, Iris Friday Seppälä.
Oona comes from a family connected with both entertainment and business. Her mother built a successful television career, while her father followed a professional path outside the Hollywood entertainment industry.
Although Oona grew up around a famous actress, she has lived a comparatively quiet life. Her identity is mainly connected with her family, childhood experiences, education, and relationship with her parents and sister.
Oona Gray Seppala’s Early Life
Oona Gray Seppala was born on October 22, 2007, in the United States. She arrived several years after Sarah Rafferty and Santtu Seppälä married, becoming the couple’s first child and beginning their journey as parents.
Her early childhood was different from that of many children because acting was already part of family life. Sarah’s profession introduced Oona to filming schedules, television sets, costumes, actors, and production environments from childhood.
Still, entertainment did not become the center of Oona’s identity. Her parents created a family life where education, everyday activities, personal development, and time together remained important throughout her childhood and teenage years.
Oona Gray Seppala’s Age and Birthday
Oona Gray Seppala was born on October 22, 2007. She is 18 years old as of September 2026 and will celebrate her 19th birthday on October 22, 2026.
Her zodiac sign is Libra based on her October birthday. Oona entered adulthood when she celebrated her 18th birthday in October 2025, marking an important new stage in her personal journey.
Her age has become one of the most searched details about her. As Sarah Rafferty continues attracting new Suits fans, many viewers naturally become curious about how old her eldest daughter is today.
Growing Up in a Famous Family
Growing up as Sarah Rafferty’s daughter gave Oona an unusual connection with television and entertainment. She experienced parts of the acting industry through her mother without becoming a professional child performer herself.
Oona could see that successful television required much more than appearing in front of cameras. Filming schedules, costumes, makeup, production crews, rehearsals, travel, and long working days were familiar parts of her mother’s profession.
Her family nevertheless maintained a balance between entertainment and ordinary life. Oona and Iris were able to experience their mother’s working environment while also focusing on school, family activities, and their own development.
Oona Gray Seppala’s Mother, Sarah Rafferty
Sarah Rafferty is an American actress who was born on December 6, 1972, in New Canaan, Connecticut. She developed an interest in acting and eventually received professional training that prepared her for television and film work.
She studied English and Theatre at Hamilton College before continuing her acting education at the Yale School of Drama. Her education provided a strong foundation for the professional acting career she later developed.
Sarah eventually became internationally recognized for playing Donna Paulsen in Suits. Her performance made Donna one of the show’s memorable characters and introduced Sarah to audiences in many different countries around the world.
Sarah Rafferty’s Success in Suits
Sarah Rafferty joined Suits as Donna Paulsen when the legal drama began in 2011. Donna became known for her intelligence, confidence, humor, loyalty, and ability to understand the people working around her.
Sarah remained an important part of the series throughout its nine-season run. Her performance and chemistry with the other cast members helped make Donna an important character within the story and its relationships.
The series ended in 2019 but later reached another large audience through streaming. This renewed popularity introduced Sarah to younger viewers and also increased curiosity surrounding her husband, daughters, and life outside acting.
Oona Gray Seppala’s Father, Santtu Seppälä
Santtu Seppälä is Oona’s father and the husband of Sarah Rafferty. His longer name has also been given as Aleksanteri Olli-Pekka Seppälä, although he is generally known publicly by the shorter name Santtu.
Unlike his actress wife, Santtu developed his professional life outside acting and entertainment. He has worked in finance and business, giving the family a professional background that extends beyond Sarah’s television and acting career.
Santtu maintains a quieter profile than Sarah and rarely appears in entertainment coverage. Together, he and Sarah have focused on family life while raising Oona and Iris alongside the demands of Sarah’s career.
Sarah Rafferty and Santtu Seppälä’s Marriage
Sarah Rafferty and Santtu Seppälä married in June 2001 in Greenwich, Connecticut. Their marriage began several years before they welcomed Oona, allowing the couple to establish their relationship before becoming parents.
Oona arrived in October 2007 as their first daughter. Several years later, the family grew again when Sarah and Santtu welcomed their second daughter, Iris Friday Seppälä, in January 2012.
Their different professional lives have created an interesting family environment. Sarah works in entertainment, while Santtu’s work has largely remained outside Hollywood, giving their daughters experience with two very different professional worlds.
Oona Gray Seppala’s Younger Sister
Oona has one younger sister named Iris Friday Seppälä. Iris was born on January 27, 2012, making her a little more than four years younger than her older sister Oona.
Both sisters have shared the unusual experience of growing up with a mother recognized by television viewers worldwide. They have also experienced parts of Sarah’s professional environment together while maintaining their everyday family lives.
As the older sister, Oona reached childhood and teenage milestones before Iris. Their shared family background, however, gives the sisters many common experiences that have remained an important part of their upbringing together.
Oona and Iris Growing Up Together
Oona and Iris spent their childhood within the same creative family environment. Sarah has described her daughters enjoying activities such as singing, dancing, joking, and having fun together when they were younger.
These activities formed part of their normal childhood rather than a professional entertainment career. Their home environment allowed them to enjoy creativity without requiring them to become performers simply because their mother was an actress.
The sisters also occasionally experienced Sarah’s workplace and television environment together. These experiences gave them memories connected with Suits while allowing them to continue growing up mainly outside the public entertainment spotlight.
Growing Up Between Los Angeles and Toronto
Oona’s childhood included experiences in both Los Angeles and Toronto because of her mother’s work. While the family maintained life in Los Angeles, Suits was filmed primarily in Toronto, Canada.
Sarah’s filming commitments meant the family sometimes had to adjust between different locations and routines. Oona therefore became familiar with travel and changing environments during important years of her childhood and education.
Living around different places also gave Oona experiences beyond a single hometown environment. She learned to adapt to changing routines while continuing school, family activities, and the ordinary responsibilities that came with growing up.
Oona Gray Seppala and the Suits Set
Oona became familiar with the Suits production environment while she was still young. She and Iris sometimes visited their mother at work and experienced parts of the television set from behind the scenes.
The girls enjoyed areas such as hair and makeup, wardrobe spaces, and places where food was available. They also became familiar with common production words, including the familiar commands “action” and “cut.”
For Oona, these experiences were connected with her mother’s everyday work rather than celebrity excitement. The set was where Sarah performed her job, allowing her daughters to understand acting from a family perspective.
Did Oona Appear in Suits?
Oona experienced the environment surrounding Suits, but her connection with the show came through her mother. Sarah Rafferty was the professional performer in the family and played Donna Paulsen throughout the popular series.
Visiting a television production allowed Oona to understand what happens away from the cameras. She could experience costumes, makeup, production staff, filming routines, and other elements involved in creating a successful television show.
Her childhood connection with the series therefore came from family experiences rather than building her own identity around the program. Oona remained primarily Sarah’s daughter while Sarah continued developing her acting career.
Oona Gray Seppala’s Education
Education formed an important part of Oona’s childhood while her mother continued working professionally. During the years surrounding Suits, she experienced schooling alongside the family’s movement between Los Angeles and Toronto.
Balancing school with changing locations gave Oona experience adapting to different routines. Her upbringing provided opportunities to learn from ordinary education while also observing a professional creative environment through Sarah’s television career.
Now that Oona has entered adulthood, education can continue playing an important role in her future. Her experiences have given her exposure to different places and industries that could influence whichever direction she eventually chooses.
Oona Gray Seppala’s Interests
Oona grew up in a creative household where singing, dancing, humor, and entertainment were familiar parts of childhood. Sarah has described both Oona and Iris enjoying these kinds of activities while they were younger.
Growing up around an actress also gave Oona opportunities to observe storytelling and performance closely. She could see television production from behind the scenes instead of knowing entertainment only through finished programs shown to audiences.
As she has grown older, Oona has kept her everyday interests away from broad public attention. Her childhood nevertheless shows that creativity and family activities were natural parts of the environment in which she developed.
Is Oona Gray Seppala an Actress?
Oona Gray Seppala has a strong family connection with acting because of Sarah Rafferty. She has spent time around television sets and has seen parts of professional production from an unusually young age.
Her public identity, however, has centered on being Sarah and Santtu’s eldest daughter rather than on professional acting roles. She has been able to experience entertainment without having to build a childhood career around it.
Oona is still young and has many possible directions ahead of her. Her experience around entertainment could be useful if she chooses a creative field, while her upbringing also gives her freedom to follow another profession.
Oona’s Relationship With Sarah Rafferty
Oona shares an important mother-daughter relationship with Sarah Rafferty. Sarah became a mother while developing her acting career and had to balance professional schedules with the responsibilities involved in raising her children.
Oona experienced her mother both as a successful television actress and as a parent. This gave her a perspective on Sarah that is very different from viewers who primarily know her through Donna Paulsen.
Their family experiences have included ordinary home life as well as television production and travel. Sarah’s approach allowed Oona to understand her mother’s profession without making entertainment the central feature of her own identity.
Oona Gray Seppala’s Personal Life
Oona has spent most of her life outside the intense publicity sometimes associated with celebrity children. Although people recognize her name because of Sarah Rafferty, she has not made constant public appearances part of her identity.
Her childhood was instead shaped by education, family relationships, travel, creative experiences, and occasional exposure to Sarah’s professional environment. This gave Oona an unusual upbringing without requiring her to become a celebrity herself.
Now that she is an adult, Oona can gradually create an identity based on her own interests and decisions. Her future education, career, and personal goals can develop independently from her mother’s successful television career.
Oona Gray Seppala’s Social Media Presence
Oona has not built the kind of large public social media presence often associated with celebrity children. Much of what audiences have seen of her over the years has appeared through family moments involving Sarah.
This quieter online presence has helped keep Oona’s everyday experiences separate from her mother’s fame. Her school life, friendships, personal relationships, and routine activities have generally remained outside entertainment coverage.
As Oona moves further into adulthood, she can decide how much of her life she wants to share. Her approach so far shows a clear difference between being related to a celebrity and becoming a public personality.
Why Oona Gray Seppala’s Age Is Popular
Oona Gray Seppala’s age has become a particularly common subject because older information about celebrity children can quickly become outdated. Her October 2007 birth date provides a simple way to calculate her current age.
As of September 2026, Oona is 18 years old. She will turn 19 on October 22, 2026, exactly nineteen years after her birth in October 2007.
Her move from childhood into adulthood has naturally increased curiosity about her future. People who remember Sarah discussing her daughters when they were young may be surprised that Oona has already reached adulthood.
Oona Gray Seppala’s Family Roots
Oona has an American upbringing combined with Finnish family roots through her father. The Seppälä surname reflects the Finnish side of her family background, adding another cultural connection to her personal story.
Her mother was born and raised in Connecticut before building an acting career. Her father followed a business and finance path, while Oona and Iris grew up experiencing their parents’ different backgrounds and professional worlds.
The family also spent time connected with Los Angeles and Toronto because of Sarah’s career. These different cultural and geographical experiences helped create a childhood that was broader than a traditional Hollywood upbringing.
Oona Gray Seppala’s Future
At 18, Oona is beginning an important period when education and career decisions can gradually shape her adult identity. Her childhood has already given her exposure to entertainment, business, travel, and different environments.
A creative profession would connect naturally with the world she observed through Sarah. At the same time, her father’s professional background demonstrates that there are many possible career directions outside acting and television.
Oona now has the opportunity to choose a path based on her own interests. Whatever profession she eventually follows, her future can increasingly become defined by her own achievements, experiences, and personal decisions.
Final Thoughts
Oona Gray Seppala is the eldest daughter of Suits actress Sarah Rafferty and Santtu Seppälä. Born on October 22, 2007, she is 18 years old in September 2026 and turns 19 in October.
Her childhood combined family life, education, travel, and occasional experiences around her mother’s television work. She also grew up alongside her younger sister, Iris, while experiencing life between entertainment and ordinary family routines.
As Oona enters adulthood, she has many possible directions ahead of her. Her story remains closely connected with Sarah Rafferty, but her education, interests, career choices, and future can increasingly shape her independent identity.
Frequently Asked Questions
How old is Oona Gray Seppala?
Oona Gray Seppala is 18 years old as of September 2026. She was born on October 22, 2007, and will celebrate her 19th birthday on October 22, 2026.
Who are Oona Gray Seppala’s parents?
Oona is the eldest daughter of American actress Sarah Rafferty and Santtu Seppälä. Sarah is famous for playing Donna Paulsen in Suits, while Santtu has worked in finance and business.
Does Oona Gray Seppälä have a sister?
Yes. Oona has one younger sister named Iris Friday Seppälä, who was born on January 27, 2012. The sisters grew up together while experiencing their mother’s successful entertainment career.
Is Oona Gray Seppälä an actress?
Oona grew up around acting because of her mother and occasionally experienced television production environments. Her identity so far, however, has mainly been connected with her family rather than professional acting.
Why is Oona Gray Seppala famous?
Oona is famous mainly because she is Sarah Rafferty’s eldest daughter. Sarah’s international success as Donna Paulsen in Suits created public interest in Oona, her sister Iris, and their family.
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