20 Sets Of On-Screen Siblings You Didn’t Know Were Actually Dating Behind The Scenes

It’s not at all unheard of for co-stars to start dating each other. In the high-pressure, close-knit environment of a film or TV set, sometimes it’s almost inevitable. But when the co-stars in question are playing siblings, it can get a little more awkward. That’s what happened to these 20 couples… and not surprisingly, many of them kept their relationships on the down-low.

20. Blake Lively and Penn Badgley (Gossip Girl)

On the set of Gossip Girl, Blake Lively ended up going out with her on-screen stepbrother Penn Badgley. However, it was perhaps less weird than it could have been, because the stepsiblings too ended up in a romantic relationship. Which meant, unfortunately, that after Lively and Badgley broke up they had to keep playing lovers for the rest of the show. But luckily, according to members of the Gossip Girl cast, they remained professional throughout.

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