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    21 Famous People Who Ended Up Dating (Or Marrying) Their Onscreen Family Member

    They kept it all in the (fictional) family.

    1. Bill Hader and Anna Kendrick played siblings (also Santa's children) in the Christmas movie Noelle and have been "'quietly' dating for over a year."

    Bill Hader and Anna Kendrick

    2. Georgia Moffett played David Tennant's daughter on Doctor Who. They were rumored to have started dating around 2008, then got married in 2012 and have been together ever since.

    David Tennant with his arm around Georgia Moffett

    3. David Cassidy and Susan Dey played siblings on The Partridge Family, and while Susan had a huge crush on David, he didn't initially feel the same. David shared that he finally gave in but "couldn't think of her as anything but [his] sister."

    David Cassidy and Susan Dey in the '60s

    4. Maureen McCormick and Barry Williams played siblings Marcia and Greg Brady on The Brady Bunch and dated for a bit in real life — Barry was actually Maureen's first kiss!

    Maureen and Barry in the '60s

    5. John Travolta played Diana Hyland's son in The Boy in the Plastic Bubble, and they began dating in 1976 until Diana's death in 1977.

    John Travolta walking with Diana Hyland

    6. Matthew Broderick and Jennifer Grey played siblings Ferris and Jeannie Bueller in Ferris Bueller's Day Off and started secretly dating while they made the film.

    Matthew Broderick and Jennifer Grey on the red carpet

    7. Eleanor Tomlinson and Harry Richardson played sister and brother in Poldark and then dated for about a year until their breakup in 2018.

    Eleanor Tomlinson and Harry Richardson

    8. Emily VanCamp and Chris Pratt played sister-and-brother duo Bright and Emily Abbott on Everwood, then dated for three years.

    Emily VanCamp and Chris Pratt in the early 2000s

    9. Maggie Grace and Ian Somerhalder played stepsiblings Shannon Rutherford and Boone Carlyle on Lost, then began dating after their characters were killed on the show.

    Ian Somerhalder with his arm around Maggie Grace

    10. Tamela and David Mann have been married since 1988 but starred as daughter and father in the movie and TV versions of Meet the Browns; they have reprised their role in several Tyler Perry projects.

    David and Tamela Mann posing together

    11. Jennifer Carpenter and Michael C. Hall played sister and brother on Dexter, eloped in 2008, got divorced in 2010, and then continued to play the roles until the end of the series in 2013 and returned for the 2021 revival.

    Michael C. Hall smiling with Jennifer Carpenter on the red carpet

    12. Shannen Doherty and Jason Priestley played sister and brother on Beverly Hills, 90210, and years after the series ended, Jason acknowledged briefly dating Shannen along with some of his other costars.

    Shannen Doherty and Jason Priestley smiling on the red carpet

    13. Katherine Heigl and Jason Behr played sister and brother on Roswell and got together shortly after meeting on set.

    Katherine Heigl and Jason Behr smiling together

    14. Michael Emerson and Carrie Preston have been married since 1998, and Carrie ended up getting to play Michael's mother on Lost all because of a joke.

    Michael Emerson and Carrie Preston smiling together

    15. Lauren Graham and Peter Krause played siblings Sarah and Adam Braverman on Parenthood, and after years of trying to keep Peter in the friend zone, Lauren finally started quietly dating him during the run of their show.

    Lauren Graham and Peter Krause smiling together

    16. Tom Hanks and Rita Wilson played siblings in Sleepless in Seattle five years after getting married in 1988.

    Tom Hanks and Rita Wilson smiling together

    17. Shane West and Evan Rachel Wood played siblings on Once and Again when Shane was 21 and Rachel was 12. Nine years later, they reunited and started dating.

    Evan Rachel Wood and Shane West posing together

    18. Kirstie Alley and Parker Stevenson married in 1983 and then went on to play siblings on the miniseries North and South: Book II.

    Kirstie Alley and Parker Stevenson posing together

    19. Will Arnett and Amy Poehler were actually married in 2003, before they went on to play the sibling skating duo Stranz and Fairchild Van Waldenberg in Blades of Glory.

    Amy Poehler and Will Arnett smiling together

    20. Milo Ventimiglia starred as Hayden Panettiere's uncle on Heroes; they began dating during the show's run in 2007 and stayed together for about two years.

    Milo Ventimiglia and Hayden Panettiere smiling together

    21. Drew Barrymore and David Arquette played siblings in Never Been Kissed, and years later David confirmed that the two had dated years before (even though Drew denied it).

    Drew Barrymore and David Arquette laughing together