Zosia Mamet (b. 1988) is an American actress best known for her role as Shoshanna Shapiro on the HBO series Girls. Mamet has also had roles in Mad Men and Unbreakable Kimmy Schmidt.
Mamet had a featured role as Bella in the 2016 Sesame Street Christmas special, Once Upon a Sesame Street Christmas.
Mamet also appeared with Miss Piggy in 2016, in an episode of Miss Adventure, Kate Spade New York's webseries.