Oona Gray Seppala is the eldest daughter of Suits actress Sarah Rafferty and Finnish American financier Santtu Seppälä. Born on October 22, 2007, Oona grew up largely away from the spotlight despite having a famous mother. She has occasionally appeared in family photos and accompanied her mother to the Suits set, but Sarah Rafferty has generally protected her daughters’ privacy.
As of 2026, Oona is 18 years old. Publicly verified information about her current education, career plans, relationships, and finances remains limited. That privacy is important because many websites publish unverified claims about celebrity children as though they were established facts.
Here is what is reliably known about Oona Gray Seppala, her family background, childhood, education, and connection to Sarah Rafferty.
Who Is Oona Gray Seppala?
Oona Gray Seppala is best known publicly as Sarah Rafferty’s eldest daughter. Her father is Santtu Seppälä, a finance professional whom Rafferty met while they were students at Yale.
Oona was born on October 22, 2007. Her younger sister, Iris Friday Seppälä, was born on January 27, 2012. PEOPLE has reported that Sarah and Santtu have worked to maintain an open and supportive family environment while keeping their daughters largely outside the entertainment spotlight.
Unlike her mother, Oona does not have an established public acting career or a widely documented professional profile. Much of what appears online about her alleged career, social media activity, or artistic ambitions is either poorly sourced or speculative.
Profile Summary
| Detail | Information |
|---|---|
| Full name | Oona Gray Seppala |
| Date of birth | October 22, 2007 |
| Age in 2026 | 18 |
| Mother | Sarah Rafferty |
| Father | Santtu Seppälä |
| Younger sister | Iris Friday Seppälä |
| Nationality | American |
| Known for | Being Sarah Rafferty’s eldest daughter |
| Mother’s best known role | Donna Paulsen in Suits |
| Public career | Not reliably documented |
| Marital status | No reliable public information |
| Net worth | Not publicly established |
Some websites list additional personal details as facts, but there is not enough authoritative evidence to verify many of them. For a private young adult, it is more responsible to separate documented information from internet speculation.
Early Life and Family Background
Oona grew up in a family that combined the entertainment industry with the financial world.
Her mother, Sarah Rafferty, became internationally recognized for playing Donna Paulsen on the legal drama Suits. Rafferty later appeared in productions including Grey’s Anatomy, Chicago Med, and Netflix’s My Life with the Walter Boys. USA Network identifies Oona and Iris as Rafferty’s two daughters.
Her father, Santtu Seppälä, followed a very different professional path. He studied at Yale and later earned an MBA from the Wharton School before building a career in finance.
This gave Oona a childhood shaped by two very different professional environments. Her mother’s work involved acting, television production, and travel, while her father’s career centered on finance and investment.
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Education and Student Life
Education is one of the areas where online articles about Oona often contain unsupported details.
What is documented is that Oona experienced a bi-coastal childhood while Suits was being filmed in Toronto. PEOPLE reported that Sarah Rafferty’s family lived between Los Angeles and Toronto, meaning Oona attended two different schools during that period. Rafferty said she initially worried about the arrangement but ultimately felt the experience helped build her daughter’s confidence and self-esteem.
Beyond that, reliable public information about Oona’s current college or university education is limited.
Claims that identify a specific school, course, major, or student organization should therefore be treated cautiously unless supported by a credible source or a direct public statement.
Oona Gray Seppala’s Parents
Oona’s parents are Sarah Rafferty and Santtu Seppälä.
Sarah Rafferty was born in Connecticut and studied English and theatre at Hamilton College before attending the Yale School of Drama. Her acting career eventually led to her breakthrough as Donna Paulsen on Suits.
Santtu Seppälä has built his professional reputation in finance rather than entertainment. He and Rafferty met while studying at Yale. Their relationship eventually developed into a marriage that has lasted more than two decades.
Oona Gray Seppala’s Siblings
Oona has one publicly documented sibling, her younger sister Iris Friday Seppälä.
Iris was born on January 27, 2012. Sarah Rafferty has spoken publicly about the close relationship between her daughters and about teaching them empathy, honesty, and emotional openness.
There is no reliable evidence that Oona has brothers. Several low-quality biography websites contain contradictory family information, so those claims should not be treated as authoritative.
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How Did Santtu Seppala Meet Sarah Rafferty?
Sarah Rafferty and Santtu Seppälä met at Yale University.
Rafferty was studying acting, while Seppälä was pursuing his own academic and professional path. Their relationship began before Rafferty became widely known for Suits, making their marriage independent of her later television fame.
That distinction matters when understanding Oona’s family story. She was born into an established marriage rather than a relationship that began after her mother’s rise to celebrity.
Sarah Rafferty and Santtu Seppala’s Wedding Story
Sarah Rafferty and Santtu Seppälä married on June 23, 2001, at the Roman Catholic Church of St. Mary in Greenwich, Connecticut. USA Network confirms the wedding date and location and notes that the couple later welcomed two daughters.
Rafferty has occasionally reflected publicly on the longevity of their marriage. In 2021, she marked their 20th anniversary on social media.
By the time Oona was born in 2007, her parents had already been married for more than six years.
Santtu Seppala’s Family Life
Santtu Seppälä has maintained a considerably lower public profile than his wife.
He is primarily known for his finance career and for being Sarah Rafferty’s husband. Public sources identify him as a Yale graduate with an MBA from Wharton and describe his work in investment and business.
His relatively private lifestyle has helped the family keep much of their day-to-day life away from celebrity coverage.
Sarah Rafferty’s Life as a Mother
Sarah Rafferty has frequently emphasized that motherhood is one of the most important parts of her life.
In interviews, she has described her daughters as funny, affectionate, outgoing, and central to her world. She has also discussed the importance of creating an environment where her children feel comfortable talking openly with their parents.
During Oona’s childhood, Rafferty’s work required extensive travel between Los Angeles and Toronto. Her daughters sometimes visited the Suits set and became familiar with the cast and production environment.
Oona’s Connection to the Suits Set
Although Oona grew up around Suits, she did not become a child performer on the series.
Sarah Rafferty has explained that her daughters enjoyed visiting the set. They spent time around craft services, the hair and makeup area, and wardrobe fittings. Rafferty also said the girls became close to members of the cast and their families.
Interestingly, the children did not regularly watch Suits. Rafferty later said her daughters had been around the production without necessarily becoming viewers of the show itself.
Oona’s Career and Achievements
There is currently no well documented professional career for Oona Gray Seppala.
This is an important distinction because some websites describe her as an actress, artist, journalist, or rising entertainment personality. Those descriptions are not sufficiently supported by authoritative sources.
At 18, Oona has plenty of time to choose her own career path. Whether she eventually enters acting, finance, education, arts, media, or another field is not publicly established.
Her mother’s career may provide valuable exposure to entertainment, but there is no evidence that Oona is required to follow the same path.
Artistic Style and Inspiration
There is no reliable public record establishing Oona Gray Seppala’s personal artistic style or creative influences.
Because Sarah Rafferty is an actress and her father works in finance, online writers sometimes assume that Oona has inherited a particular career interest. Such assumptions should not be presented as facts.
The safest conclusion is that Oona has grown up around both creative and professional environments, while maintaining considerable personal privacy.
Personal vs. Public Life Balance
Privacy is one of the clearest themes in Oona’s story.
Sarah Rafferty has shared occasional family moments, but she has not turned her daughters into public personalities. Photos and comments about Oona have generally appeared in the context of birthdays, family memories, or interviews about motherhood.
This approach is particularly significant because Oona spent most of her childhood as a minor while her mother was a recognizable television actress.
As a result, there is considerably more verified information about Sarah Rafferty than about Oona herself.
Oona Gray Seppala’s Personality
There is not enough independent public information to provide a definitive description of Oona’s personality.
However, Sarah Rafferty has spoken about raising her daughters with an emphasis on honesty, empathy, confidence, and emotional connection. When Oona was eight, Rafferty discussed wanting her daughter to know she could talk to her parents about anything and feel secure in her family relationship.
Those comments provide insight into the environment in which Oona was raised, rather than proving specific personality traits.
Oona Gray Seppala Net Worth and Finances
Oona Gray Seppala’s personal net worth is not publicly established.
Some celebrity biography websites publish estimated figures, but there is no reliable financial disclosure supporting a specific amount. Because Oona does not have a documented public career with known earnings, assigning her a dollar figure would be speculation.
Her parents’ financial circumstances should also not be confused with Oona’s personal wealth.
Future Goals
Oona’s future career goals have not been reliably disclosed.
At 18, she is entering a stage of life in which education, career, and personal interests may develop considerably. Unless she or her family publicly discusses those plans, claims about her future profession remain speculation.
A responsible biography should leave room for that uncertainty rather than inventing a career trajectory.
What Is Oona Gray Seppala Doing Today?
As of 2026, Oona Gray Seppala appears to maintain a relatively private life.
There is no widely documented public career, major entertainment project, or verified professional profile that establishes what she does day to day.
What can be confirmed is that she is now 18, is the eldest daughter of Sarah Rafferty and Santtu Seppälä, and grew up alongside her younger sister Iris.
Her limited public presence is not evidence that she is inactive. It simply reflects the family’s long-standing preference for keeping personal matters private.
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Key Facts
- Oona Gray Seppala was born on October 22, 2007.
- She is Sarah Rafferty’s eldest daughter.
- Her father is Santtu Seppälä.
- Her younger sister is Iris Friday Seppälä.
- Oona is 18 years old in 2026.
- She spent part of her childhood between Los Angeles and Toronto.
- She sometimes visited her mother’s Suits set.
- Her parents met at Yale University.
- Sarah Rafferty and Santtu Seppälä married in 2001.
- Oona’s professional career has not been reliably documented.
- Her personal net worth is not publicly known.
- Her family has generally protected her privacy.
FAQs
Who is Oona Gray Seppala?
Oona Gray Seppala is the eldest daughter of actress Sarah Rafferty and financier Santtu Seppälä.
How old is Oona Gray Seppala in 2026?
Oona Gray Seppala is 18 years old in 2026, having been born on October 22, 2007.
Who is Oona Gray Seppala’s mother?
Her mother is American actress Sarah Rafferty, best known for playing Donna Paulsen on Suits.
Who is Oona Gray Seppala’s father?
Her father is Santtu Seppälä, a finance professional who studied at Yale and earned an MBA from Wharton.
Does Oona Gray Seppala have a sister?
Yes. Her younger sister is Iris Friday Seppälä, who was born in January 2012.
Does Oona Gray Seppala have brothers?
There is no reliable evidence that Oona has any brothers. Publicly documented sources identify Iris as her sibling.
Is Oona Gray Seppala an actress?
There is no reliable evidence that Oona currently has an established professional acting career.
Where did Oona Gray Seppala go to school?
Sarah Rafferty has confirmed that Oona attended two schools during the family’s bi-coastal lifestyle between Los Angeles and Toronto, but detailed current education information is not reliably public.
Did Oona visit the Suits set?
Yes. Sarah Rafferty said her daughters visited the Suits set and enjoyed spending time around production, including wardrobe, hair and makeup, and craft services.
When did Sarah Rafferty marry Santtu Seppala?
Sarah Rafferty and Santtu Seppälä married on June 23, 2001, in Greenwich, Connecticut.
What is Oona Gray Seppala’s net worth?
Oona’s personal net worth has not been reliably disclosed, so published estimates should be treated as speculation.
Final Word
Oona Gray Seppala is best understood not as another celebrity trying to enter Hollywood, but as a young woman who grew up in a well known family while largely staying outside the spotlight.
She is the eldest daughter of Sarah Rafferty and Santtu Seppälä and the older sister of Iris Friday Seppälä. Her childhood included an unusual experience of moving between Los Angeles and Toronto while her mother filmed Suits, giving her an early view of the entertainment industry without making her part of it.
The most important takeaway is that verified information about Oona remains limited by design. Her parents have shared selected details about family life, but they have also respected their daughters’ privacy. For that reason, claims about Oona’s career, education, net worth, relationships, or future plans should be treated carefully unless supported by a reliable source.
That balance between public interest and personal privacy makes Oona’s story different from a conventional celebrity biography. Her identity is connected to a famous family, but her future remains her own.
