Happy 15th birthday to Twilight - 10 facts about the Robert Pattinson and Kristen Stewart-fronted vampire love story

'Twilight' - the first in the mega movie franchise based on the trilogy of YA books by Stephenie Meyer - has turned 15. To mark this milestone in vampire cinema history - which was followed by 'New Moon', 'Eclipse' and the two-part 'Breaking Dawn' film - take a look back at the romantic flick that made stars out of its leading man and woman, Robert Pattinson and Kristen Stewart. Here are 10 facts you never knew about 'Twilight'...