Rounding out the quartet as talkative virgin Shoshanna, Zosia Mamet is probably the most familiar face on "Girls." She's had recurring roles on "Mad Men" (as Peggy's lesbian friend Joyce), "Parenthood," and "The United States of Tara," and appeared in films like "The Kids Are All Right" and "Greenberg." And yes, she has a famous dad, too: renowned playwright David Mamet. But the Mamet name doesn't necessarily guarantee a smooth path to stardom. She tells the Huffington Post, "One of my first auditions I ever had, an older director told me how much he hated my dad. I was like, 'That's weird'... I'm proud of where I came from, but it's made for some interesting moments."
Get to Know the Cast of HBO's 'Girls'
HBO's raw and revealing comedy is earning plenty of buzz in its first season; learn more about its cast of young newcomers.