Blake Lively high school
Credit: Seth Poppel/Yearbook Library; Sara Jaye Weiss/StartraksPhoto

Gossip Girl returns tonight! To celebrate, we're taking a look back at the show's cast members before they were the toast of the Upper East Side. Click through the gallery to see high school yearbook photos from Blake Lively, Leighton Meester, Chace Crawford, and more, and tune in to The CW at 8/7c tonight to catch the latest episode of Gossip Girl!