Rob and Kristen fell off Catherine Hardwicke’s bed during the audition

Rob and Kristen fell in love and dated on and off for years after meeting on set.

During their audition, the pair got so carried away they ended up on the floor of the director’s bedroom.

Of the MTV Movie Award Best Kiss winners, Catherine Hardwicke said: "Rob and Kristen did the audition right here on the bed. They did the kissing scene and he fell off and landed right there on this floor. Rob and Kristen auditioned on my bed - the kissing scene. Rob was so into it he fell off the bed. I’m like, ‘Dude, calm down.’ And I’m in there filming with my little video camera.”