Since lots of people meet romantic partners at work, it's not uncommon for actors to date co-stars. But when they date -- or even marry -- someone who plays an on-screen relative, it can seem a little creepy. Regardless, there are plenty of stars who've done it.

  • Milo Ventimiglia & Hayden Panettiere

    Between 2006 and 2010, Milo played Hayden's uncle on NBC's 'Heroes' -- and for about a year and a half of that time, the pair also dated off-screen.

    Michael Buckner, Getty Images
  • Matthew Broderick & Jennifer Grey

    They had a testy relationship as brother and sister in 1987's classic John Hughes film 'Ferris Bueller's Day Off,' but away from the cameras, they were privately dating -- until a tragic car accident shoved their relationship into the spotlight.

    Paramount Pictures
  • Michael C. Hall & Jennifer Carpenter

    Michael and Jennifer played adoptive siblings through all eight seasons of the Showtime series 'Dexter' -- but in real life, they were married from 2008 to 2011. Despite their divorce, they remain close friends.

    Frazer Harrison, Getty Images
  • Peter Krause & Lauren Graham

    On the NBC drama 'Parenthood,' Peter and Lauren play brother and sister Adam and Sarah Braverman. Off-screen, they've been dating since 2010.

    David Livingston, Getty Images
  • David & Tamela Mann

    The Manns are the same age, just celebrated their 25th wedding anniversary, and have four children and several grandchildren together -- yet David played Tamela's father on the Tyler Perry series 'Meet the Browns.'

    Rick Diamond, Getty Images
  • Bruce Campbell & Ellen Sandweiss

    'Evil Dead' franchise star Bruce Campbell once said he lost his virginity at age 23 to co-star Ellen Sandweiss -- who played his sister in the first film.

    New Line Cinema
  • Michael Emerson & Carrie Preston

    Married since 2008, Carrie and Michael were blood relatives on 'Lost' the year before -- but because she played his character's mom in flashbacks, they never actually appeared together on-screen.

    Jason Merritt, Getty Images
  • John Travolta & Diana Hyland

    Hyland played Travolta's mother in the 1976 TV movie 'The Boy in the Plastic Bubble,' and despite an 18-year age difference, the two struck up a romance that lasted until her death from breast cancer the following year.

    Francois Durand, Getty Images / ABC
  • Will Arnett & Amy Poehler

    Now separated, Will and Amy were married when they played incestuous ice skating siblings Stranz and Fairchild Van Waldenberg in the 2007 movie 'Blades of Glory.'

    Michael Loccisano, Getty Images
  • Chris Pratt & Emily VanCamp

    In 2004, Chris and Emily had a real-life romance while also playing siblings Bright and Amy Abbot on the WB series 'Everwood.'

    The WB