Oona O’Brien is an American actress who gained recognition for playing Devon Lee in the popular Netflix series Cobra Kai. She began exploring the entertainment industry through modeling, commercials, and theatre before earning a recurring television role. Born into a creative family, she is also the daughter of Radiohead guitarist Ed O’Brien. From her early life and family background to her acting career, physical appearance, and estimated net worth, here is a closer look at the important details of Oona O’Brien’s life.
Oona O’Brien – Quick Bio Table
Category
Details
Full Name
Oona O’Brien
Date of Birth
September 15, 2006
Age
20 Years Old (as of November 2026)
Height
5 feet 7 inches (170 cm)
Birthplace
Evanston, Illinois, USA (reported; conflicting sources)
Nationality
American
Zodiac Sign
Virgo
Profession
Actress and Model
Famous For
Playing Devon Lee in Cobra Kai
Father
Ed O’Brien
Mother
Susan Kobrin
Siblings
Salvador O’Brien
Family Background
Daughter of Radiohead guitarist Ed O’Brien
Education
Acting and improvisation training; college details not confirmed
School
Not publicly confirmed
Marital Status
Not publicly reported as married
Husband
Not publicly known
Children
Not publicly known
Hair Color
Brown
Eye Color
Brown
Weight
Approximately 125 lbs (57 kg), according to an older professional résumé
Body Measurements
Not publicly available
Hobbies & Interests
Acting, martial arts, swimming, music, and travel
Acting Debut
Sky High (2020 short film)
Notable TV Show
Cobra Kai (2021–2025)
Character in Cobra Kai
Devon Lee
Other Acting Experience
Annie, School of Rock, and The Fig and the Wasp
Commercial Work
Nike, American Girl, Sears, and Kmart
Martial Arts Skills
Karate and stage combat
Awards
No individually verified major acting awards found
Net Worth
Estimated Net Worth $200,000 USD
Main Income Sources
Acting, modeling, and commercial work
Instagram
@obrien.oona
Instagram Profile
instagram.com/obrien.oona
Famous Family Connection
Radiohead musician Ed O’Brien
Public Personality
Described herself as competitive and organized
College Plans
Discussed applying to colleges in a 2025 interview
Current Career Status
Developing her acting career
Oona O’Brien Career Timeline
Year
Career Event
Details
Early Years
Modeling
Started gaining experience through print modeling and commercial assignments.
Before 2020
Commercial Work
Worked on promotional projects for brands including Nike and American Girl.
2020
Acting
Appeared as Mia Savage in the short film Sky High.
2021
Television Debut
Joined Cobra Kai as Devon Lee in Season 4.
2022
Career Growth
Returned as Devon Lee in Season 5.
2024
Season 6
Continued her role in the sixth season of Cobra Kai.
2025
Series Finale
Appeared in the final episodes of Cobra Kai, released in February 2025.
2025–2026
Career Development
Her next major acting projects and career developments require further confirmation.
Oona O’Brien Family
Family Member
Name
Details
Father
Ed O’Brien
English musician, guitarist, and member of Radiohead.
Mother
Susan Kobrin
Described in biographical reporting as having a background in kinesiology and wellness.
Brother
Salvador O’Brien
Oona’s older brother.
Sister
Not publicly known
No publicly confirmed sister.
Paternal Family
Ed O’Brien’s family
Connected to the British music industry through Radiohead.
Oona O’Brien Dress Collection
Event / Appearance
Dress Style
Details
Cobra Kai Season 6 Fan Event (2024)
Pale pink dress
Sleeveless design with black trim and a waist bow.
