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.

19. Matthew Broderick and Jennifer Grey (Ferris Bueller’s Day Off)

Jennifer Grey played Ferris’ sister in Ferris Bueller’s Day Off and then began dating her on-screen sibling. Unfortunately, it ended in a very bad way indeed. In 1987, the pair were involved in a car crash which killed two people and injured Broderick, who had been driving on the wrong side of the road. Grey never quite recovered from the trauma, and didn’t pursue her Hollywood career with as much verve as she had before the incident. Her relationship with Broderick also didn’t last.

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18. Will Arnett and Amy Poehler (Blades of Glory)

Will Arnett and Amy Poehler are both comedians, so of course they’d do everything in their power to make their marriage funny. They ended up throwing themselves into playing a creepily incestuous brother-sister pair in the 2007 ice skating comedy Blades of Glory. They say the couple who laughs together stays together… but unfortunately Arnett and Poehler didn’t. They separated in 2012 and divorced in 2016, leaving a treasure trove of double-act comedy behind them.

17. Maureen McCormick and Barry Williams (The Brady Bunch)

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The Brady Bunch always seemed so wholesome! But there was plenty of hanky-panky going on behind the scenes, it later transpired. Barry Williams and Maureen McCormick, who played siblings Marcia and Greg, were getting up close and personal whenever the cameras were off. McCormick wrote in her 2008 memoir about her exact thoughts when making out with Williams for the first time. And they were? “Oh my God! I’m kissing my brother. What am I doing?”

16. Drew Barrymore and David Arquette (Never Been Kissed)

In the sweet ’90s comedy Never Been Kissed, David Arquette played the brother of Drew Barrymore’s character. But much later it turned out that they’d quietly – very quietly – carried on a romance before the movie. According to Arquette, anyway. “[We] used to date when we were very young kids. Well, not little kids!” he said in 2014 on Watch What Happens Live. “She’s just one of the sweetest, kindest people in Hollywood.” But Barrymore for her part apparently denies it.

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15. Emily VanCamp and Chris Pratt (Everwood)

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Before Chris Pratt was an A-lister, he was an actor on Everwood dating his on-screen sister, Emily VanCamp. “We’ve pretty much gotten used to the response of, ‘Ew, that’s weird. That’s creepy,’” Pratt told TV Guide in 2006. But however creepy people found it, their relationship did last from 2004 to 2007, after which they went their separate ways. Both actually ended up in the Marvel Cinematic Universe, Pratt as Star-Lord and VanCamp as Agent 13 – but their characters have yet to meet.

14. Robert Pattinson and Nikki Reed (Twilight)

Before Robert Pattinson hooked up with Kristen Stewart and sent teenage girls everywhere into a tizzy, he was dating a different Twilight star. This was Nikki Reed, who was playing… his adoptive sister. Oh dear. But that was almost certainly a secondary consideration, as rumor has it the Twilight cast then had to navigate a Pattinson/Stewart/Reed love triangle, with Stewart accused of “stealing” Pattinson away. Ten years on, though, it seems to be all water under the bridge… hopefully.

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13. Ashley Greene and Kellan Lutz (Twilight)

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A lot was going on at the Twilight set, apparently. Ashley Greene and Kellan Lutz also allegedly dated, even though they too played a brother and sister, albeit adopted ones. In 2011 it was reported that the two were moving in together, and they certainly seemed to be very close indeed. Come 2018 Greene was spotted hanging out with Lutz and his wife Brittany Gonzales, so whatever happened it must have ended happily.

12. David Cassidy and Susan Dey (The Partridge Family)

David Cassidy was huge in the ’70s. Every girl wanted him. But curiously, one of the girls who came closest to getting him was his Partridge Family sister, Susan Dey. She had a huge crush on Cassidy, and all her co-stars knew. Even Cassidy knew, and reportedly he wasn’t a gentleman about it. He paraded his other dates in front of her until finally the two ended up having a one-night stand, one that went nowhere. Despite Dey’s best efforts, they never had a real relationship.

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11. Michael C. Hall and Jennifer Carpenter (Dexter)

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Things got very complicated indeed on serial killer show Dexter – and not just on-screen. Michael C. Hall and Jennifer Carpenter played adopted siblings Dexter and Debra, but they ended up in a romance and then a marriage. They eloped in 2008… and then divorced in 2011. Unfortunately, by then the writers had already moved pieces into place for a controversial Dexter/Debra incest storyline, which the poor actors then had to play out.

10. Ian Somerhalder and Maggie Grace (Lost)

There was a lot going on on Lost, and one early plot point was the too-close relationship between stepsiblings Boone and Shannon. Sure, they weren’t biologically related, but they were basically brother and sister. The sexual tension spread to the actors who played them, Ian Somerhalder and Maggie Grace, and they ended up dating for a short time. Their relationship only lasted from 2006 to 2007, but they actually remained good friends afterwards.

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9. Bruce Boxleitner and Kathryn Holcomb (How the West Was Won)

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Bruce Boxleitner and Kathryn Holcomb had to face two obstacles after they fell in love on the set of How the West Was Won. Firstly, Holcomb already had a boyfriend. Secondly, she was playing Boxleitner’s character’s younger sister in the show. And yet, they overcame all that and got married. “We get kidded a lot about incest,” Boxleitner joked to People in September 1978. Unfortunately the marriage was over by 1987, but the couple did have two children together.

8. Lauren Graham and Peter Krause (Parenthood)

Actors Lauren Graham and Peter Krause have known each other since 1995, when they co-starred in Caroline in the City. But they only fell in love while playing a brother and sister on the 2010 TV show Parenthood. They had to keep playing siblings until the show ended in 2015… and they’re still together! Graham even got Krause his dream role on the Gilmore Girls revival in 2017. Maybe wedding bells will ring in the future?

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7. Emily VanCamp and Dave Annable (Brothers & Sisters)

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Emily VanCamp seems to have a tendency to date her on-screen siblings. After Everwood she starred in the aptly named Brothers & Sisters, and ended up dating her TV brother Dave Annable. The writers quickly added a plot where it turned out the two weren’t related after all, much to VanCamp’s relief. “I’m all for breaking boundaries, but we didn’t need to get into incest,” she told Entertainment Weekly in 2008. In real life, VanCamp and Annable split after less than two years together.

6. Katherine Heigl and Jason Behr (Roswell)

Katherine Heigl began dating Jason Behr in 1999, when the pair of them played siblings on the TV show Roswell. It didn’t last very long – despite rumors that they were planning a wedding, they had split up by 2001. Now Heigl is married to Josh Kelley, and Behr to KaDee Strickland, and both have children. But a reboot of Roswell was ordered by The CW in 2018. Could the duo perhaps team up one more time?

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5. Evan Rachel Wood and Shane West (Once and Again)

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When Evan Rachel Wood first played Shane West’s on-screen sister in Once and Again, she was just 12. But several years later in 2009, when she was a grown adult and the pair were no longer playing siblings, they were spotted getting very close at West’s 31st birthday party. “I think you can put two and two together,” Wood told Hollyscoop at the time, when asked if they were dating. But it didn’t last, and Wood later married actor Jamie Bell.

4. Kirstie Alley and Parker Stevenson (North and South: Book II)

Kirstie Alley and Parker Stevenson had already been married for three years when they played brother and sister Billy and Virgilia Hazard in the 1986 miniseries North and South: Book II. But that wasn’t all that happened on that set – Alley admitted later it was during North and South that she fell in love with her co-star Patrick Swayze, despite both of them having spouses. Unsurprisingly, Alley and Stevenson were divorced by 1996.

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3. Dean Charles-Chapman and Nell Tiger-Free (Game of Thrones)

Some things are just inevitable. On Game of Thrones Dean Charles-Chapman and Nell Tiger-Free played Lannister siblings – and if you watch the show, you know the Lannisters are very prone indeed to incest. So when they began dating, Charles-Chapman and Tiger-Free must have had to put up with a lot of jokes. Their co-star Maisie Williams couldn’t resist getting in on the action either. In 2015 she linked back to an article about the budding romance and captioned it “INCEST BANTS.”

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2. Selena Gomez and David Henrie (Wizards of Waverly Place)

Selena Gomez used to date Justin Bieber, of course. But before that, all the way back in 2010, she was linked with her Wizards of Waverly Place on-screen brother, David Henrie. Whatever took place between them, it didn’t last, although the media went wild speculating about their dates and any potential Bieber-related love triangle. And in 2017 Henrie married beauty queen Maria Cahill, and Selena was present at the wedding. Awww.

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1. Mark Hamill and Carrie Fisher (Star Wars)

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Everyone knows the Luke and Leia story – the pair of them kissed before they found out they were siblings. But as it happened Mark Hamill and Carrie Fisher were up to something too! “Carrie and I were attracted to one another,” Hamill told The Guardian in 2017, before recounting a story of how they once ended up “making out like teenagers.” But just as Luke and Leia thankfully never continued any romance after discovering they were related, Hamill and Fisher eventually developed a sibling-like relationship themselves.

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