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. Hall reportedly had multiple affairs, and the couple split.
While it all may be just hearsay that these two on screen siblings dated in real life, Susan Dey and David Cassidy were part of The Partridge Family as singing and performing brother and sister.
Maybe the feelings were just one sided, or maybe Cassidy didn't want to reveal his true feelings about his on screen sister, but in his autobiography, "C'Mon Get Happy," he explained that feelings were not there for this Partridge family sis.
"We love to play the board game Settlers of Catan," Odette, 29, tells Us.
"That's how nerdy we are." Us broke news four years ago that the couple tied the knot in an intimate Ojai, Calif., ceremony.
Broody: After becoming an aunt, the 27-year-old said she is so 'excited' to have children of her own.
"When we went on a date, I thought, ' Well, I gotta lock this up,'" he tells Us. " PHOTOS: Hottest Hollywood couples The couple are pretty tame when it comes to discussing their relationship, but have been known to go on double dates — and celebrate birthdays — with pals Jessica Simpson and her husband Eric Johnson.
Luckily, they do have fun when they relax at home just by themselves too.
These 15 couples dated while working on their shows, sometimes playing a couple on the show while also dating in real life. 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.