Discover the best fashion and clothing worn by Jason (Jason Segel) in Knocked Up.
From Judd Apatow comes a story about a one night stand that ends all others. In the comedy Knocked Up, an accidental pregnancy forces a mismatched duo on a fast track to adulthood. Starring Katherine Heigl as Alison, an ambitious go-getter, and Seth Rogen as Ben Stone, the lovable slacker, he leans on his stoner pal played by Jason Segel. Keeping it low key in faded button downs and graphic tees, he's about to launch his multi-million dollar idea, but first some bong hits are in order.