Kristen Stewart

Kristen Stewart

Kristen Stewart says being in 'The Twilight Saga' was a "once in a lifetime" opportunity.

The 22-year-old actress, who plays Bella Swan in the vampire franchise, is surprised at how 'Twi-hard' fans have remained so dedicated since the films began in 2008 and thinks they have made the experience even more enjoyable.

Speaking at the UK premiere of 'The Twilight Saga: Breaking Dawn - Part 2' in London's Leicester Square on Wednesday (14.11.12), she told BANG Showbiz: "To sustain energy from one project is pretty remarkable and we wouldn't have been able to do that if we were the only fans.

"But to turn up to here and have a million people doing that with you is insane and amazing. It's contagious. A once in a lifetime."

Kristen, Robert Pattinson (Edward Cullen) - her on-screen husband and real-life boyfriend - and co-star Taylor Lautner (Jacob Black), admitted they were "emotional" the film franchise had come to an end and producer Wyck Godfrey says he is proud of the work the cast have done to bring Stephenie Meyer's novels to life.

He said: "It's just rewarding to have been part of bringing the movie to these fans. I mean Stephenie created the fans - we're really just stewards on the movies and I believe that we've done a good job in bringing the books to the screen.

"Hopefully this last one will end with a bang - the response in America has been unbelievable and we're excited!"

'The Twilight Saga: Breaking Dawn Part Two' is in cinemas from November 16.