Sex scenes in movies have often stirred debate, with fans discussing at length whether actors had real-life sex or were faking it. Some actors have held their hands up in pride and others deny anything other than acting.

Check out sex - sorry, six - films below which have stirred debate and tell us which of them you think contain real-life hanky-panky...

Loading Slideshow...

  • The sex was real in 9 Songs, Michael Winterbottom's 2004, which film is often said to be the most sexually-explicit mainstream film ever released.

  • Antichrist director Lars Von Trier included real sex between stars Willem Dafoe and Charlotte Gainsbourg in this film

  • The Postman Always Rings Twice reportedly saw Jack Nicholson and Jessica Lange have sex for real

  • Sienna Miller has denied it, but an on-set insider claimed that the sex scenes between Miller and on-screen (and reportedly off-screen) love interest Hayden Christensen in Factory Girl were very real

  • "It's not about sex it's about sexuality," claims the trailer for Shortbus, a film full of real-sex.

  • Béatrice Dalle and Jean-Hugues Anglade were rumoured to have had sex in this 1986 French film.