Actress Kristen Stewart broke down in tears as she filmed a wedding scene for the next installment of the Twilight franchise, because the ceremony felt so real.

In The Twilight Saga: Breaking Dawn - Part 1, the actress' character Bella Swan marries vampire Edward Cullen, played by her rumored real-life boyfriend Robert Pattinson.

Stewart was overwhelmed when she first saw the setting for the climactic scene and was wracked with nerves because she felt like she was marrying Pattinson for real.

She tells Britain's GQ magazine, "I was nervous for the wedding scene. When I looked at the set, with the pews and the lights, and I could see everyone there in their outfits, I cried. It felt incredibly ceremonial."

"It felt like a real wedding."