It happens pretty often. Actors meet while working together on a show, and the next thing you know, they hit it off.
These 15 couples dated while working on their shows, sometimes playing a couple on the show while also dating in real life. Or, in some cases, they played siblings.
Either way, those relationships (and the subsequent break-ups) definitely had an affect on their shows.
Here are 15 couples whose real-life romances ruined their shows.
Nina Dobrev and Ian Somerhalder
While their characters dated on The Vampire Diaries, Nina Dobrev and Ian Somerhalder dated in real life. Their relationship eventually ended, which was apparently one of the reasons Nina Dobrev decided to leave the show.
Michael C. Hall and Jennifer Carpenter
They played siblings (okay, not traditional ones) on Dexter, but Michael C. Hall and Jennifer Carpenter began dating shortly after they met, and then running off to elope. They stayed together for a while, but Michael C. Hall reportedly had multiple affairs, and the couple split. Still, they had to keep playing siblings after they were divorced. Awkward!
Kaley Cuoco and Johnny Galecki
While their characters were in and on-again, off-again relationship on The Big Bang Theory, Kaley Cuoco and Johnny Galecki were dating in secret. Their relationship lasted about two years.
Rachel Bilson and Adam Brody
The O.C.'s Rachel Bilson and Adam Brody dated while they worked on the show, but their relationship didn't exactly work out. Later, Bilson stated that the relationship caused stress on set.
Kat Dennings and Nick Zano
Kat Dennings and Nick Zano dated in real life while filming 2 Broke Girls. It didn't last, though, and Dennings is now dating Josh Groban.
Joshua Jackson and Katie Holmes
Joshua Jackson and Katie Holmes started dating when they met on the set of Dawsons Creek, but actually split up before their characters got together. That really had to be weird for them.