Sydney Bernice Sweeneyis an American actress. She first gained attention in 2018 for appearing in the television series Everything Sucks! and The Handmaid's Tale, and in the limited series Sharp Objects. In the following year, she was featured in the Quentin Tarantino-directed film Once Upon a Time in Hollywood.
Sweeney gained wider recognition for her roles in the HBO drama series Euphoria (2019–present) and the first season of the anthology series The White Lotus (2021), which earned her nominations for two Primetime Emmy Awards.
In 2023, she portrayed Reality Winner in the drama film Reality and led the commercially successful romantic comedy Anyone but You. In 2024, she starred in the superhero film Madame Web, and produced and starred in the horror film Immaculate.
