SYDNEY SWEENEY BIOGRAPHY - AGE, CAREER, MOVIES & FACTS

Sydney Sweeney is an American actress and producer who became a household name as Cassie Howard in HBO's Euphoria and Olivia Mossbacher in The White Lotus. Born Sydney Bernice Sweeney on September 12, 1997, in Spokane, Washington, she started acting as a child and has since grown into one of the most sought-after stars of her generation.

Early Life

Sydney Bernice Sweeney was born on September 12, 1997, in Spokane, Washington, U.S. She developed an interest in acting early and began working in television and film as a child, remaining active in the industry from 2009 to the present. As of October 2026, she is 29 years old.

Career Breakthrough

Before her breakthrough, Sweeney appeared in Everything Sucks! (2018), The Handmaid's Tale (2018) and Sharp Objects (2018). She then landed the role of Cassie Howard in HBO's Euphoria (2019–2026), a performance that earned her a Primetime Emmy nomination in 2022. That same year, she received another Emmy nomination for playing Olivia Mossbacher in the first season of The White Lotus (2021). Fans of the show can also read our Zendaya biography and Jacob Elordi biography for more on her Euphoria co-stars.

Films

Sweeney's film work includes Quentin Tarantino's Once Upon a Time in Hollywood (2019), where she appeared alongside Margot Robbie (see our Margot Robbie biography) and Austin Butler (see our Austin Butler biography). She earned critical acclaim for playing whistleblower Reality Winner in Reality (2023) and headlined the box office hit Anyone but You (2023). She followed those with Madame Web (2024) and the horror film Immaculate (2024), then won further praise for Christy (2025), in which she portrays boxer Christy Martin, a role for which she gained 30 lbs. She also starred in The Housemaid (2025).

Production Company

In 2020, Sweeney founded her own production company, Fifty-Fifty Films, through which she develops projects as both an actress and a producer.

Watch the Official Trailer

Sweeney steps into the ring as boxing icon Christy Martin in Christy, in theaters November 7. Watch the official trailer from Black Bear below:

FAQ

How old is Sydney Sweeney?
Sydney Sweeney was born on September 12, 1997, which makes her 29 years old as of October 2026.

What is she known for?
She is best known for playing Cassie Howard in HBO's Euphoria and Olivia Mossbacher in the first season of The White Lotus, both of which earned her Emmy nominations.

Which movies has she starred in?
Her film credits include Once Upon a Time in Hollywood, Reality, Anyone but You, Madame Web, Immaculate, Christy and The Housemaid.

Did she receive Emmy nominations?
Yes. She received Primetime Emmy nominations in 2022, one for Euphoria and one for The White Lotus.