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Penn Badgley Reveals Why Kissing Blake Lively Was Both Amazing AND Terrible

The dangers of dating your costar are very real, according to Penn.

It’s always a really exciting thing when your fave TV couple takes their romance off-screen. Remember when Adam Brody and Rachel Bilson dated during “The O.C.,” proving themselves just as sickeningly adorable as Seth and Summer? Or what about when “The Vampire Diaries” stars Nina Dobrev and Ian Somerhalder made our worlds complete with their IRL romance?

Unfortunately, though, those relationships don’t always work out (see both examples above), which can make things super awkward if your on-screen characters are still very much together.

That was also the case for “Gossip Girl” stars Penn Badgley and Blake Lively, who dated on and off from 2007 to 2010 — a time that overlapped with their characters’ on-screen relationship.

After they split, though, their characters were still an item, which Penn recently admitted was a little weird.

While appearing on Bravo’s “Watch What Happens Live,” the 28-year-old “Cymbeline” star was asked about his best on-screen kiss. “I’ll say Blake because we actually had a relationship at the time,” he spilled. “And worst? Maybe Blake after we broke up.”

Ouch.

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In our opinion, though, Penn’s admission is actually kind of a compliment to Blake. After all, for a character nicknamed “Lonely Boy,” Penn’s Dan Humphrey sure didn’t have any problem keeping the ladies around. During his time on “Gossip Girl,” he managed to lock lips with Leighton Meester, Hilary Duff, Michelle Trachtenberg, AND Jessica Szohr.

Penn went on to insist that he and Blake were “consummately professional” during the last two years of “Gossip Girl,” which they filmed after breaking up. “I think we should both pat ourselves on the back for getting through it — because, you know, anything is complicated in that way, and we handled it,” he said.

Which is probably a good thing, considering that — spoiler alert! — their characters ended up tying the knot at the end of the series.

We’re happy Penn has no hard feelings toward Blake, but don’t expect her to return the favor by admitting he was her fave on-screen kiss, too. After all, she DID end up marrying her “Green Lantern” costar Ryan Reynolds — so he wins this one.