Watch Girls and Really Really Star Zosia Mamet Celebrate Her Birthday with Jimmy Fallon

Girls star Zosia Mamet is making her off-Broadway debut in the jaw-dropping drama Really Really, and the actress stopped by Late Night with Jimmy Fallon on February 1 not only to dish about the new play, but also to celebrate her 25th birthday! Fallon, who presented the Girls cast with their recent big win at the Golden Globes, was thrilled to reunite with the actress as she reminicsed about her early experiences on the show, before it became a pop culture phenomenon. Click below to see Mamet discuss her play, her famous dad (David Mamet) and, of course, Girls. Don’t miss Mamet make her stage debut in Really Really!