Gossip Girl Costars Blake Lively and Penn Badgley Split

blake lively penn

Blake Lively and Penn Badgley, 23-year-old costars on Gossip Girls, have split.

The couple began dating in 2007 and called it splits in mid-September but kept the break-up under wraps for the past few weeks.

"They're professionals," says a source. "They're still good friends and hang out on the set."

Lively spoke with Allure magazine last month but would not talk about her love-life, "Yeah, I don't comment on my relationships, so you can skip that one!" she said. "My anonymity is something I treasure. Wanting to be an actor and wanting to be famous are different."

A Gossip Girl insider was surprised about the split, "Nobody on set had any idea," says the insider. "They're really just private."