They’re pros so you wouldn’t know it, but there are a lot of stars who played BFFs on-screen that didn’t get along AT ALL as soon as the cameras stopped rolling. Business Insider put together a list of 13 sets of actors who had to play best friends on screen, but who reportedly HATED each other in real life.

Some of them are legendary, like the feud between Kim Cattrall & Sarah Jessica Parker on Sex and the City or Shannen Doherty and just about anyone, but and others you may not have known about.  Click HERE for the full list (and background!) from Business Insider.