Robert & Kristen: Hollywood's Worst-Kept Secret?

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Love on the set: When Edward and Bella said their "I Do's" in The Twilight Saga: Breaking Dawn - Part 1 it was the wedding that fans had been longing to see -- and it was just as exciting for co-stars Kristen Stewart and Robert Pattinson. Now ET traces their on and off-screen relationship. Watch the video!
"It felt, like, for real," Kristen told ET about the onscreen wedding. "Everything came to fruition. Sparks kind of flew."
Robert went as far as to claim that the minister cast to preside over the onscreen wedding was actually ordained, and when asked if his onscreen 'I do's' were legally binding, he replied gamely, "I don't know. I haven't done a prenup yet."
Their rumored relationship was probably the worst-kept secret in Hollywood, but neither star would publicly fess up to their union. Kristen would only acknowledge in the press that she had an "English" boyfriend, and told ET, "I'm never gonna talk about it, and it's gonna continue to be like, 'You're almost trying to make it more of a big deal,' but I'm actually not, because there is no other way in playing it."
The Twilight Saga: Breaking Dawn - Part 1 is now on DVD and Blu-ray, with The Twilight Saga: Breaking Dawn - Part 2 set to hit theaters November 16, 2012.