Zosia Mamet, born on February 2, 1988, is an American actress and musician known for her breakout role as Shoshanna Shapiro in the HBO series Girls. She is the daughter of playwright David Mamet and actress Lindsay Crouse, and she grew up in New England before moving to Pacific Palisades, California.

She decided to pursue acting instead of going to college after finishing high school. She has a sister, Willa, who is a singer, and two half-siblings, Clara and Noah. Mamet identifies as Jewish, and her given name is Polish and Russian.

In 2012, she was cast by Judd Apatow in "Girls," which became her most recognized role. She has also starred as Annie Mouradian in the HBO Max series "The Flight Attendant" and Pampinea in the Netflix series "The Decameron."

Zosia Mamet has a band called Chacha and has performed voice-over work in shows like "Star vs. The Forces of Evil," "Regular Show," and "The Simpsons." She performed the audiobook "The Feral Detective" by Jonathan Lethem.

Zosia Mamet began dating actor Evan Jonigkeit in 2013, and they married in October 2016. At the 2017 Makers Conference, she performed a monologue describing her experience of living with undiagnosed pelvic floor dysfunction for six years. She is known for her candidness and humor, often sharing personal stories and insights about her life and career.

Throughout her career, she has appeared in various films and television shows, including "The Kids Are All Right," "Mad Men," "United States of Tara," and "Parenthood." Her filmography includes roles in "Wiener-Dog," "The Boy Downstairs," "Under the Silver Lake," and "Alone Together."

She is set to appear in the upcoming films "Molli and Max in the Future" and "Madame Web."