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The final Twilight film, Breaking Dawn, may be split into two parts.

Kristen Stewart, who plays Bella Swan in the saga, says the cast has already signed up to appear in the movie but doesn't know if it'll be one or two films.

The 19-year-old actress was speaking at the Baftas at London's Royal Opera House, where she picked up the rising star award.

She said: "We're all definitely on board to do Breaking Dawn but what's up in the air at this point is still whether or not it's going to be one or two films."

Stewart said she couldn't reveal much more information either about the final chapter in Stephenie Meyer's story.

"Unfortunately, most of the info is pretty much out there," she said.

The third part of the Twilight saga, Eclipse, has already been filmed and is released around the world at the end of June.

Anna Kendrick, who plays Bella's high school friend Jessica and was also at the Baftas, says she's looking forward to seeing how it turned out.

"I wasn't there for very much of filming," she said. "I come in and come out and I get to see the movie for the first time like an audience member, which is actually really fun."

The 24-year-old actress also paid tribute to the film's diehard fans, known collectively as Twihards.

"They're so sweet," she admitted. "It's actually really nice to see people who are genuinely here for your autograph because they're a fan and not because they want to sell it on eBay."