8 Celeb Couples Who Played Siblings On-screen And Dated Off-screen

When it comes to TV and film, chemistry on-screen can be so intense that it sometimes sparks romance off-screen, too — even among stars who play blood relatives. Dive into the most intriguing cases where onscreen family ties gave way to real-life connections.

Katherine Heigl and Jason Behr

Katherine Heigl and her costar Jason Behr played siblings on the sci-fi TV series Roswell, as reported by E! Online, but their connection didn’t end when the cameras stopped rolling. The pair dated for the majority of the show’s three-year run, splitting up in 2002, per the outlet.

Lauren Graham and Peter Krause

Lauren Graham and Peter Krause played brother and sister on the family drama Parenthood, developing a close friendship on set that soon turned into a long-term real-life romance. The pair started dating after being cast in the NBC drama, where, for six seasons, they played Adam and Sarah Braverman. They later separated after almost 12 years together, per Today.

Matthew Broderick and Jennifer Grey

Matthew Broderick and Jennifer Grey famously played siblings in the classic film Ferris Bueller’s Day Off before dating in real life. The couple began their romance during filming and were engaged for a short period in 1988, according to Business Insider.

Dave Annable and Emily VanCamp

Dave Annable and Emily VanCamp portrayed half-siblings with plenty of drama on Brothers & Sisters, but behind the scenes, the duo dated, bringing even more intrigue to their complicated on-screen relationship, per Elite Daily. While details surrounding their split were never fully revealed, VanCamp wished Annable well upon exiting the series, according to the outlet.

Ian Somerhalder and Maggie Grace

Ian Somerhalder and Maggie Grace played step-siblings in the adventure-packed series Lost, where their close bond translated into a real-life romance off camera. The couple began dating after the series wrapped production, according to Glamour magazine U.K. Their romance was short-lived but still notable as a classic case of sibling costars taking their connection beyond the island.

Lily Collins and Jamie Campbell Bower

Lily Collins and Jamie Campbell Bower played on-screen siblings in The Mortal Instruments: City of Bones, where their electric connection fueled much of the film’s tension. The pair were first linked in July 2012 while shooting the film, but it was reported in August 2013 that they had ended the relationship, per Us Weekly.

Jennifer Carpenter and Michael C. Hall

Jennifer Carpenter and Michael C. Hall took dark family dynamics to a new level as adoptive siblings on Dexter — including a brief incestuous storyline in the sixth season — and romance blossomed in real life as well. The two met on set in 2006 while filming the series, and in 2008, dating rumors began, according to InStyle. On New Year’s Eve 2008, the couple got married in Big Sur, California, per People. In December 2011, NBC Los Angeles reported that their divorce was finalized.

Bill Hader and Anna Kendrick

Bill Hader and Anna Kendrick made headlines for their surprising relationship, reportedly starting to date after starring as siblings in the 2019 Disney+ film Noelle, according to People. In June 2022, the couple went their separate ways, per ET Online.