Oona O'Brien, an American actress and model, gained widespread recognition for her role as Devon Lee in the Netflix series Cobra Kai. She recently went viral on TikTok when fans discovered that her father is Ed O'Brien, the legendary guitarist and founding member of the iconic rock band Radiohead. Oona had not publicly identified Ed as her father, but the guitarist hinted at the connection in a Mother's Day Instagram post in 2023, writing: 'Happy Mother's Day to all the Mums... All love to Suzi and my Mum, Eve... Suzi... the most beautiful Mum to Salvador and Oona.'
Key Takeaways
- Oona O'Brien was born on 15 September 2006 in Evanston, Illinois, and is 19 years old as of June 2026.
- She has worked as a print and on-screen child model since early childhood.
- Her father is Ed O'Brien, a Radiohead guitarist and Rock and Roll Hall of Fame inductee.
- Her mother is Susan Kobrin, a kinesiologist and former Amnesty International staff member.
Profile Summary
- Full name: Oona O'Brien
- Gender: Female
- Date of birth: 15 September 2006
- Age: 19 years (as of June 2026)
- Zodiac sign: Virgo
- Place of birth: Evanston, Illinois, United States
- Current residence: United States
- Nationality: American
- Ethnicity: Mixed White (English-Jewish)
- Religion: Christianity
- Height: 5'7" (170 cm)
- Weight: 125 lb (57 kg)
- Hair colour: Brown
- Eye colour: Dark brown
- Mother: Susan Kobrin
- Father: Ed O'Brien
- Siblings: 1
- Marital status: Single
- Profession: Actress and model
- Instagram: @obrien.oona
Who is Oona O'Brien?
Oona O'Brien is a young American actress and model who rose to prominence through her recurring role as Devon Lee in the Netflix series Cobra Kai. She first appeared on screen in the 2020 short film Sky High and was subsequently cast in Cobra Kai Season 4 at just 14 years old.
When is Oona O'Brien's birthday?
The actress and model was born on 15 September 2006, making her zodiac sign Virgo. As of June 2026, Oona O'Brien is 19 years old.
How old is Devon in Cobra Kai?
Oona was 14 years old when she first appeared in Cobra Kai Season 4, which aired in 2021. Her character, Devon Lee, is a teenage karate student at West Valley High School. By the time the show's sixth and final season concluded in February 2025, Oona was 18.
Who are Oona O'Brien's parents?
Oona O'Brien's parents are Ed O'Brien and Susan Kobrin. The couple live in London and Wales, and Oona was born while her father was on a six-week tour of America.
Oona O'Brien's father
Ed O'Brien, a renowned English guitarist and songwriter, is Oona's father. Born on 15 April 1968 in Oxford, England, Ed is best known as a founding member of Radiohead, one of the most critically acclaimed bands in rock history. He was inducted into the Rock and Roll Hall of Fame as a member of Radiohead in 2019. In 2010 and 2023, Rolling Stone named him among the greatest guitarists of all time. In 2020, he released his debut solo album, Earth, under the name EOB, followed by his second solo album, Blue Morpho, in May 2026.
When TikTok users discovered that the actress portraying Devon Lee was the daughter of a Radiohead icon, the revelation went viral. The shared last name had always been there, but the connection genuinely surprised a generation of fans who grew up with Cobra Kai rather than Radiohead's discography. Ed even mentioned Oona in his Mother's Day Instagram post dedicated to his mother and Oona's mum.
Oona O'Brien's mom
Susan Kobrin is Oona's mother. She is a kinesiologist who focuses on integrated wellness, including systematic kinesiology, nutritional therapy, and energy-based modalities. Susan previously worked for Amnesty International before building her practice in holistic health. She and Ed O'Brien raised their family between London and Wales, and the family also spent time in Brazil in 2011, an experience that deeply influenced Ed's solo music career.
Who are Oona O'Brien's siblings?
Oona has one older brother, Salvador O'Brien, born in January 2004. Salvador is also noted for his artistic inclinations and has been associated with collegiate student-athlete pursuits.
Is Oona O'Brien Asian?
Oona O'Brien's ethnicity is mixed White (English-Jewish). Her father, Ed, is English, and her mother, Susan Kobrin, is of Jewish heritage. Some early and unverified fan sources circulated claims of Asian heritage, but these have not been substantiated by credible sources. Oona's religion is Christianity.
Career
Before her big break on screen, Oona worked as a child model from the age of 11. She appeared in numerous commercials and print ads, promoting brands including Nike, American Girl, Sears, and Kmart. She also developed her stage skills through several theatre productions, including The Fig and the Wasp at Cara Haven Theatre, Second City Youth Ensemble at Second City, Annie at Pepper Rising Stars Theatre, and School of Rock (as Tomika) at UAC Theatre.
Oona is represented by the Paonessa Talent Agency and Brave Artists Management. Her screen career began in 2020 with the short film Sky High, where she played Mia Savage. Her breakthrough came when she was cast as Devon Lee in Season 4 of Cobra Kai.
Oona O'Brien as Devon Lee in Cobra Kai
In the series, Devon Lee is a student at West Valley High School who begins her journey with Eagle Fang Karate under Sensei Johnny Lawrence. She is portrayed as ambitious, competitive, and self-driven. In a Her Campus interview, Oona said: 'I definitely have her competitive mindset. I'm also very goal-oriented. I always have to have my Google Docs with all my goals. Devon's sort of the same way. A little bit of type A.'
Devon's arc across Seasons 4 through 6 saw her evolve from a hot-tempered newcomer to a more reflective team player, while her ambition remained a defining trait. In Season 6 Part 2, Devon and her dojo competed in the high-stakes Sekai Taikai tournament. Cobra Kai's sixth and final season was released in three parts, with the finale dropping on 13 February 2025. Beyond acting, Oona is a trained martial artist and stage combat expert, and she is also an avid swimmer.
How tall is Oona O'Brien?
Oona O'Brien's height is 5 ft 2 in or 157 cm, and she weighs about 125 lbs or 57 kg. She has brown hair and dark brown eyes.
How old was Oona when she married Chaplin?
The Cobra Kai actress has never been married and has no connection to Charlie Chaplin. As of June 2026, she is single and has no reported romantic relationships. Charlie Chaplin, a famous actor and filmmaker, was married to Oona O'Neill in 1943; she was 18 years old at the time.
FAQs
- Who are Oona O'Brien's parents? Her father is Ed O'Brien, guitarist of Radiohead, and her mother is Susan Kobrin, a kinesiologist.
- What is Oona O'Brien's ethnicity? She has mixed ethnicity: English (White) on her father's side and Jewish on her mother's side.
- How old is Oona O'Brien? She is 19 years old as of June 2026, born on 15 September 2006.
- What is Oona O'Brien's religion? Her religion is Christianity.
- What is Devon Lee's real name? Devon Lee is the character; the actress's real name is Oona O'Brien.
Oona O'Brien's journey from child model to viral TikTok favourite and Cobra Kai star is a story with a remarkable twist at its centre. Her famous father's identity left fans genuinely stunned. Growing up as the daughter of Ed O'Brien, the Radiohead guitarist and Rock and Roll Hall of Famer, the young actress was immersed in creativity and artistic ambition from birth.
