The video gives fans a taste of the final instalment in the hit vampire franchise.

It offers a sneak peek of how Kristen Stewart’s character Bella is transformed into a vampire.

The clip begins with a shot of Washington's snow-capped mountains, before Bella speeds through the woods using her new-found ability.

Taylor Lautner’s character Jacob appears in a snug-fitting sweater telling Bella, 'I didn't expect you to be so… you.'

Robert Pattinson’s character Edward is then seen taking his sweetheart’s hand in his saying 'We're the same temperature now.'

The teaser video was posted on Twitter this morning – and instantly generated comments from excited fans.

The Twilight Saga: Breaking Dawn - Part 2 is due to be released in November.

The series is based on the vampire fantasy romance novels of the same name by Stephanie Meyer and has become a huge success. The media has closely followed the moves of stars Kristen and Robert as their onscreen romance has become a reality.