Happy Birthday, Jemima Kirke! The actress, who turns 29 today, is best known for her role as Jessa Johansson, the bohemian vagabond a.k.a. one-fourth of the Girls dysfunctional-yet-lovable group of friends. Kirke first made her acting debut in BFF Lena Dunham's film, Tiny Furniture, which ultimately led to her breakout gig on the hit HBO show. Despite her success, Kirke maintains a down-to-earth state of mind, particularly when it comes to personal style. "Getting dressed is an easy thing," Kirke tells InStyle.com. "People make it really difficult."