10 Celebrities With Surprising Siblings: Demi Lovato, Scarlett Johansson, and More! (PHOTOS)

Blake Lively of Gossip Girl has a 31-year-old brother named Eric, who, not surprisingly, has modeled for Abercrombie & Fitch, Levi's, and Tommy Hilfiger. He had a small role in American Pie in 1999 and was also on The L Word. Fun fact: Eric played Stephanie Tanner's boyfriend on Full House when he was 13!