01of 15Bill Hader & Anna KendrickAlberto E. Rodriguez/Getty; Jeff Spicer/GettyThe pair played siblings Nick and Noelle Kringle in the 2019 Disney+ Christmas movieNoellebefore a sourceconfirmed their relationshipto PEOPLE in January 2022.“Anna has been dating Bill quietly for over a year,” said the source. “They met years ago. She’s hostedSaturday Night Liveand they’ve done a movie together, but they got together well after the movie.” (Kendrick hostedSNLin 2014, though Hader left the cast in 2013.)

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Bill Hader & Anna Kendrick

Alberto E. Rodriguez/Getty; Jeff Spicer/Getty

Bill Hader, Anna Kendrick

The pair played siblings Nick and Noelle Kringle in the 2019 Disney+ Christmas movieNoellebefore a sourceconfirmed their relationshipto PEOPLE in January 2022.

“Anna has been dating Bill quietly for over a year,” said the source. “They met years ago. She’s hostedSaturday Night Liveand they’ve done a movie together, but they got together well after the movie.” (Kendrick hostedSNLin 2014, though Hader left the cast in 2013.)

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Chris Pratt & Emily VanCamp

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Chris Pratt and Emily VanCamp

TheGuardians of the Galaxystar dated hisEverwoodcostar from 2004 to 2007, after the pair met on set and played siblings Bright and Amy Abbott.

03of 15Emily VanCamp & Dave AnnableAlberto E. Rodriguez/GettyVanCamp moved on from one onscreen sibling to another: in 2007, after her split from Pratt, she briefly dated her (no joke)Brothers and Sisterscostar Dave Annable, who played her character Rebecca’s half-brother Justin.The pair’s chemistry was so strong that producers ultimately switched up the show’s plot to make it so they were no longer related, executive producer Greg Berlanti toldEntertainment Weekly. “They had this electricity. There was nothing I could do,” he said.VanCamp added, “I’m all for breaking boundaries, but we didn’t need to get into incest.”

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Emily VanCamp & Dave Annable

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Actors Emily VanCamp and Dave Annable attend the “Heaven: Celebrating 10 Years” event benefiting the Art Elysium held at The Vibiana on January 12, 2008

VanCamp moved on from one onscreen sibling to another: in 2007, after her split from Pratt, she briefly dated her (no joke)Brothers and Sisterscostar Dave Annable, who played her character Rebecca’s half-brother Justin.

The pair’s chemistry was so strong that producers ultimately switched up the show’s plot to make it so they were no longer related, executive producer Greg Berlanti toldEntertainment Weekly. “They had this electricity. There was nothing I could do,” he said.

VanCamp added, “I’m all for breaking boundaries, but we didn’t need to get into incest.”

04of 15Blake Lively & Penn BadgleyJamie McCarthy/WireImageDan Humphrey and Serena van der Woodsen’s chemistry transcended the boundaries of the screenandof learning they were step-siblings: in real life, Lively and Badgley dated from 2007 to 2010.“At the time, I was wearing the same clothes and doing fashion shoots, and dating the same person that my character was dating — or sometimes that person [Dan] was my brother, you never know with Serena — and because of that, what people were projecting onto me was that I was Serena,” Lively toldVanity Fair,perELLE. “We look the same, and we acted the same as far as they could tell, because I wasn’t doing anything but that show. If [Penn and I] were photographed walking down the street, they didn’t know if it was a paparazzi shot or if it was a shot from the show.”

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Blake Lively & Penn Badgley

Jamie McCarthy/WireImage

Blake Lively and Penn Badgley attend the Nina Ricci After Party For Met Ball Hosted By Olivier Theyskens and Lauren Santo Domingo at Philippe in New York on May 5,2008 (

Dan Humphrey and Serena van der Woodsen’s chemistry transcended the boundaries of the screenandof learning they were step-siblings: in real life, Lively and Badgley dated from 2007 to 2010.

“At the time, I was wearing the same clothes and doing fashion shoots, and dating the same person that my character was dating — or sometimes that person [Dan] was my brother, you never know with Serena — and because of that, what people were projecting onto me was that I was Serena,” Lively toldVanity Fair,perELLE. “We look the same, and we acted the same as far as they could tell, because I wasn’t doing anything but that show. If [Penn and I] were photographed walking down the street, they didn’t know if it was a paparazzi shot or if it was a shot from the show.”

05of 15Michael C. Hall & Jennifer CarpenterFrazer Harrison/GettyHall and Carpenter met on the set ofDexter,where they played siblings Dexter and Debra Morgan. They began dating soon after they first met, and eloped on New Year’s Eve in 2008. After two years of marriage, they filed fordivorcedin 2010, while they continued to star on the show together until the 2012 finale.“He is and always will be one of my best friends in the world. Just because the marriage ended doesn’t mean the love isn’t still there,” CarpentertoldToday. “We take very good care of each other … we always have. I’m just really lucky.“The pair reunited for the 2021 revival,Dexter: New Blood.

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Michael C. Hall & Jennifer Carpenter

Frazer Harrison/Getty

Actress Jennifer Carpenter (R) and actor Michael C. Hall attend the Showtime Championship Boxing Hosts “No Risk, No Reward” Tailgate Party held at Liberty Grill September 2, 2006 in Los Angeles, California

Hall and Carpenter met on the set ofDexter,where they played siblings Dexter and Debra Morgan. They began dating soon after they first met, and eloped on New Year’s Eve in 2008. After two years of marriage, they filed fordivorcedin 2010, while they continued to star on the show together until the 2012 finale.

“He is and always will be one of my best friends in the world. Just because the marriage ended doesn’t mean the love isn’t still there,” CarpentertoldToday. “We take very good care of each other … we always have. I’m just really lucky.”

The pair reunited for the 2021 revival,Dexter: New Blood.

06of 15Ian Somerhalder & Maggie GraceStefanie Keenan/Patrick McMullan via GettyTheLostalumni met on the set of the hit show in 2004, in which they played step-siblings Boone Carlyle and Shannon Rutherford. They started dating after both of their characters got killed off the series, and stayed together until 2007.

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Ian Somerhalder & Maggie Grace

Stefanie Keenan/Patrick McMullan via Getty

Maggie Grace, wearing Ellen Tracy and Ian Somerhalder attend 2004 AFI

TheLostalumni met on the set of the hit show in 2004, in which they played step-siblings Boone Carlyle and Shannon Rutherford. They started dating after both of their characters got killed off the series, and stayed together until 2007.

07of 15Lauren Graham & Peter KrauseGettyThe actors initially met in 1995 on the set ofCaroline in the City, but didn’t connect romantically until they costarred on NBC’sParenthood,on which they played siblings Sarah and Adam Braverman from 2010 to 2015. They’vebeen together ever since, with Graham telling PEOPLE, “He’s really my favorite person to talk to. And he always makes me laugh. He’s really, really funny.”

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Lauren Graham & Peter Krause

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Actors Lauren Graham and Peter Krause attend the Los Angeles premiere of “Parenthood” at the Directors Guild Theatre on February 22, 2010 in West Hollywood, California.

The actors initially met in 1995 on the set ofCaroline in the City, but didn’t connect romantically until they costarred on NBC’sParenthood,on which they played siblings Sarah and Adam Braverman from 2010 to 2015. They’vebeen together ever since, with Graham telling PEOPLE, “He’s really my favorite person to talk to. And he always makes me laugh. He’s really, really funny.”

08of 15Matthew Broderick & Jennifer GreyJim Smeal/Ron Galella Collection via GettyBrother and sister Ferris and Jeannie Bueller may have despised each other in the film, but offscreen, theFerrisBueller’s Day Offstars began secretly dating and ultimately were rumored to be engaged in the ’80s.After the film’s release, the pair took a vacation to Ireland together, where they were involved in a tragic car accident that killed two people. They split not long after.

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Matthew Broderick & Jennifer Grey

Jim Smeal/Ron Galella Collection via Getty

Matthew Broderick and Jennifer Grey during 59th Annual Academy Awards at Shrine Auditorium in Los Angeles, California, United States.

Brother and sister Ferris and Jeannie Bueller may have despised each other in the film, but offscreen, theFerrisBueller’s Day Offstars began secretly dating and ultimately were rumored to be engaged in the ’80s.

After the film’s release, the pair took a vacation to Ireland together, where they were involved in a tragic car accident that killed two people. They split not long after.

09of 15Shannen Doherty & Jason PriestleyRon Galella/GettyTheBeverly Hills, 90210stars famously played twins Brandon and Brenda Walsh. Years after the long-running teen drama ended, Priestley admitted to Howard Stern that he and Doherty had briefly dated during the show’s first season. In his memoir,Jason Priestley: A Memoir, he wrote, “various combinations of people slept with each other over the years.”

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Shannen Doherty & Jason Priestley

Ron Galella/Getty

Shannen Doherty and Jason Priestley

TheBeverly Hills, 90210stars famously played twins Brandon and Brenda Walsh. Years after the long-running teen drama ended, Priestley admitted to Howard Stern that he and Doherty had briefly dated during the show’s first season. In his memoir,Jason Priestley: A Memoir, he wrote, “various combinations of people slept with each other over the years.”

10of 15Evan Rachel Wood & Shane WestJ. Vespa/WireImageAs big brother and younger sister Eli and Jessie Sammler inOnce and Again,the pair had quite the age gap: West was 21 and Wood was only 12.They didn’t start seeing each other romantically until nearly nine years later, when they were spotted holding hands at a club while celebrating Shane’s 31st birthday.“I think you can put two and two together,” Wood reportedly told Hollyscoop at the time when asked if they were dating. “I won’t confirm or deny it but I don’t think I have to.”

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Evan Rachel Wood & Shane West

J. Vespa/WireImage

Shane West and Evan Rachel Wood

As big brother and younger sister Eli and Jessie Sammler inOnce and Again,the pair had quite the age gap: West was 21 and Wood was only 12.

They didn’t start seeing each other romantically until nearly nine years later, when they were spotted holding hands at a club while celebrating Shane’s 31st birthday.

“I think you can put two and two together,” Wood reportedly told Hollyscoop at the time when asked if they were dating. “I won’t confirm or deny it but I don’t think I have to.”

11of 15Maureen McCormick & Barry WilliamsDarlene Hammond/Archive Photos/GettyAs step-siblings Marcia and Greg Brady onTheBrady Bunch, McCormick and Williams developed a chemistry that ultimately turned romantic. In 2013, Williams revealed toOprah Winfreythat they’d dated at the time, and that he’d actually been her first kiss.“That was in Hawaii while we were filming those episodes. We snuck away, it was a full moon, and walked along the sand. Well, I knew where that was headed. Of course, I set it up,” he recalled.

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Maureen McCormick & Barry Williams

Darlene Hammond/Archive Photos/Getty

American actors Maureen McCormick and Barry Williams, stars of the US TV sitcom ‘The Brady Bunch’, circa 1972.

As step-siblings Marcia and Greg Brady onTheBrady Bunch, McCormick and Williams developed a chemistry that ultimately turned romantic. In 2013, Williams revealed toOprah Winfreythat they’d dated at the time, and that he’d actually been her first kiss.

“That was in Hawaii while we were filming those episodes. We snuck away, it was a full moon, and walked along the sand. Well, I knew where that was headed. Of course, I set it up,” he recalled.

12of 15Katherine Heigl & Jason BehrJeff Kravitz/FilmMagic)After meeting on the set of 1999’sRoswell, where the pair played siblings Isabel and Max Evans, they soon struck up a romance, which lasted them through most of the show’s three-year run. Ultimately, theGrey’s Anatomystar and Behr went their separate ways in 2002.

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Katherine Heigl & Jason Behr

Jeff Kravitz/FilmMagic)

Jason Behr & Katherine Heigl Levi’s Roswell wrap party

After meeting on the set of 1999’sRoswell, where the pair played siblings Isabel and Max Evans, they soon struck up a romance, which lasted them through most of the show’s three-year run. Ultimately, theGrey’s Anatomystar and Behr went their separate ways in 2002.

13of 15Amy Poehler & Will ArnettLawrence Lucier/FilmMagicThe comedic couple had already been married for four years when they costarred as too-close siblings Fairchild and Stranz Van Waldenberg in 2007’sBlades of Glory.They starred on several other shows together, albeit not as siblings, includingArrested Development, Parks and Recreation, andHorton Hears a Who!before their split in 2014.

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Amy Poehler & Will Arnett

Lawrence Lucier/FilmMagic

Amy Poehler and Will Arnett during Mean Girls New York Premiere at Loews Lincoln Square Theatre in New York City, New York, United States.

The comedic couple had already been married for four years when they costarred as too-close siblings Fairchild and Stranz Van Waldenberg in 2007’sBlades of Glory.

They starred on several other shows together, albeit not as siblings, includingArrested Development, Parks and Recreation, andHorton Hears a Who!before their split in 2014.

14of 15Kirstie Alley & Parker StevensonRon Galella/GettyAlley and Stevenson had also already tied the knot when they played siblings Billy and Virgilia Hazard in 1986’sNorth and South: Book II.The pair firstmeta few years earlier, at a restaurant in L.A. in 1981; they went on to marry in 1983 and welcome two children together, daughter Lillie and son William, before divorcing in 1997.

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Kirstie Alley & Parker Stevenson

Actress Kirstie Alley and actor Parker Stevenson attend the Eighth Annual CableACE Awards on January 20, 1987

Alley and Stevenson had also already tied the knot when they played siblings Billy and Virgilia Hazard in 1986’sNorth and South: Book II.The pair firstmeta few years earlier, at a restaurant in L.A. in 1981; they went on to marry in 1983 and welcome two children together, daughter Lillie and son William, before divorcing in 1997.

15of 15Tom Hanks & Rita WilsonRon Galella/GettyOne of Hollywood’s most iconic couples, Hanks and Wilson — who celebrated33 years of marriagein May 2021 — met in the early ’80s on the set ofBosom Buddies, before reuniting while working together on 1985’sVolunteers.“Rita and I just looked at each other and — kaboing — that was that,” Hanks toldGQabout their immediate connection.“I asked Rita if it was the real thing for her, and it just couldn’t be denied.“They wed in 1988, before going on to play siblings Sam and Suzy Baldwin inSleeplessin Seattlea few years later. They share two kids, in addition to Tom’s children from his previous marriage.

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Tom Hanks & Rita Wilson

Actress Rita Wilson and actor Tom Hanks attend the “Dragnet” Hollywood Premiere on June 23, 1987 at the Pacific’s Paramount Theatre in Hollywood, California.

One of Hollywood’s most iconic couples, Hanks and Wilson — who celebrated33 years of marriagein May 2021 — met in the early ’80s on the set ofBosom Buddies, before reuniting while working together on 1985’sVolunteers.

“Rita and I just looked at each other and — kaboing — that was that,” Hanks toldGQabout their immediate connection.“I asked Rita if it was the real thing for her, and it just couldn’t be denied.”

They wed in 1988, before going on to play siblings Sam and Suzy Baldwin inSleeplessin Seattlea few years later. They share two kids, in addition to Tom’s children from his previous marriage.

source: people.com