You have to be careful dating a co-worker—just ask Penn Badgley and Blake Lively!
The Gossip Girl stars dated and broke up both onscreen and offscreen during their time on the show, but their real love lives didn't always match up with their characters'. This, as you can imagine, led to some awkwardness, which is probably why Penn described his ex-girlfriend as his best and worst onscreen kiss!
"I'll say Blake [was the best onscreen kiss] because we actually had a relationship at the time," the 28-year-old Cymbeline star told Bravo's Andy Cohen on Wednesday's Watch What Happens Live. "And worst? Maybe Blake after we broke up."

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