Quick Summary: Oona Gray Seppala (born October 22, 2007) is the eldest daughter of acclaimed American actress Sarah Rafferty (famed for her iconic portrayal of Donna Paulsen in USA Network’s hit legal drama Suits) and Finnish-American financial executive Aleksanteri Olli-Pekka Seppala (Santtu Seppala).
USA Network’s hit legal drama Suits remains one of the most streamed and beloved television series in modern history. Among its stellar cast, actress Sarah Rafferty captured millions of hearts worldwide with her witty, fiercely competent, and emotionally resonant portrayal of Donna Paulsen.
While fans closely followed the on-screen banter between Donna and Harvey Specter, Sarah Rafferty’s real-world life has been happily anchored by her marriage of over two decades to financial executive Santtu Seppala and their two daughters. Her eldest daughter, Oona Gray Seppala, has grown up amidst this unique intersection of Hollywood elegance and European heritage.
In this detailed 2026 biography, we explore Oona Gray Seppala’s background, her parents’ enduring love story, her multicultural Finnish-American roots, and her private life as she enters young adulthood.
Oona Gray Seppala Quick Biography & Profile Summary
| Detail | Information |
|---|---|
| Full Name | Oona Gray Seppala |
| Date of Birth | October 22, 2007 |
| Age | 18 Years Old |
| Place of Birth | United States |
| Nationality | American / Finnish heritage |
| Mother | Sarah Rafferty (Actress – Suits, Chicago Med, My Life with the Walter Boys) |
| Father | Aleksanteri Olli-Pekka Seppala (Santtu Seppala – Chief Investment Officer) |
| Siblings | Iris Friday Seppala (Younger sister, born 2012) |
| Godparents / Family Friends | Gabriel Macht & Jacinda Barrett, Meghan Markle & Prince Harry |
| Residence | Toronto (during Suits filming) / Los Angeles, California |
Parentage and The Love Story of Sarah Rafferty and Santtu Seppala
Oona Gray Seppala was born into an accomplished, intellectually curious family. Her mother, Sarah Rafferty, holds a Bachelor of Arts from Hamilton College, studied at the University of Oxford, and earned a prestigious Master of Fine Arts (MFA) from the Yale School of Drama before embarking on her prolific acting career.
Her father, Aleksanteri “Santtu” Seppala, was born in Illinois to a distinguished Finnish family. After completing his undergraduate studies at Yale University (where he met Sarah), he earned his MBA from the Wharton School at the University of Pennsylvania. Santtu has built a highly successful career as an investment analyst, asset manager, and Chief Investment Officer for international financial institutions.
Sarah and Santtu married on June 23, 2001, at the Roman Catholic Church of St. Mary in Greenwich, Connecticut. In October 2007, they welcomed their first child, daughter Oona Gray, followed by their second daughter, Iris Friday Seppala, in January 2012.
Childhood on the Sets of “Suits” and Royal Connections
When Sarah Rafferty was cast as Donna Paulsen in 2011, production of Suits required extensive filming in Toronto, Canada. As a result, Oona spent significant formative years growing up between Toronto and the United States.
The cast of Suits formed a legendary real-life bond that felt like an extended family. Oona grew up surrounded by her mother’s close co-stars, including Gabriel Macht (Harvey Specter)—who has been Rafferty’s real-life close friend since 1993—Patrick J. Adams, Rick Hoffman, and Meghan Markle (the Duchess of Sussex).
In May 2018, when Meghan Markle married Prince Harry at St George’s Chapel in Windsor Castle, Oona’s parents were among the honored guests attending the historic Royal Wedding, reflecting the deep personal relationships formed during those years.
Multicultural Roots and Academic Focus
Through her father’s lineage, Oona enjoys dual cultural ties, celebrating Finnish traditions alongside American customs. The Seppala family frequently spends summer vacations exploring Finland’s pristine lakes and archipelago, embracing outdoor wellness and Scandinavian lifestyle values.
Sarah Rafferty has frequently praised Oona in interviews for her emotional maturity, creative passion, and sharp intellect. Rather than pushing her daughters into child acting or social media publicity, Sarah and Santtu have prioritized rigorous schooling, arts appreciation, and personal exploration.
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Frequently Asked Questions (FAQs)
Who is Oona Gray Seppala’s mother?
Her mother is actress Sarah Rafferty, best known for playing Donna Paulsen on Suits, Dr. Pamela Blake on Chicago Med, and Dr. Katherine George on Netflix’s My Life with the Walter Boys.
How old is Oona Gray Seppala?
Born on October 22, 2007, Oona Gray Seppala is 18 years old.
Who is Oona Gray Seppala’s father?
Her father is Aleksanteri Olli-Pekka “Santtu” Seppala, a prominent Finnish-American financial executive and Chief Investment Officer.
Does Oona Gray Seppala have siblings?
Yes, Oona has a younger sister named Iris Friday Seppala, born in January 2012.
Does Oona Gray Seppala act like her mother?
While Oona has grown up around television sets, she has focused primarily on her academics, arts education, and personal passions away from commercial show business.
