Kristen Stewart has a big reason to be excited for “Breaking Dawn.”

SPOILER! “We totally have sex. Finally!” Kristen told Access Hollywood’s Shaun Robinson in LA on Saturday of the final chapter of “The Twilight Saga,” in which Edward (Robert Pattinson) and her character, Bella, consummate their relationship.

“[Edward and Bella] are man and wife now,” Kristen explained further. “They have a kid, and so I guess to get there, you know, that happens.”

However, before that, in “Eclipse” – due June 30 – she got to go from kissing Robert Pattinson to Taylor Lautner, a shift she called “really weird.”

“I was nervous about it,” she said. “It’s like the most unique kiss in the whole series… [Bella] sees that there are clearly two different paths that are maybe not equally as desirable but definitely good, both are great, and she’s never acknowledged that before. She’s always been like, ‘No, Edward’s perfect!’ And so it really freaks her out, and it really freaked me out playing it.”

As for the kiss itself, she said locking lips with Taylor wasn’t so bad.

“You never know whether it’s going to be good until it is,” she said. “A few of [the takes], it was like, ‘OK, cool.’ I mean, that was fine.”

While she may have fun on “The Twilight Saga” sets, she was caught on camera making what appeared to be unhappy faces at the MTV Movie Awards last weekend – which Kristen said was in the editing.

“I feel like the cameras just cut to me just as soon as I stop smiling,” she explained. “I thought most of that stuff was funny. I’m telling you, face transplant! It’s gonna happen pretty soon, I think.”

Kristen added that she’s become more comfortable with fame after two years of the “Twilight Saga” whirlwind.

“I’m very appreciative,” she said, before addressing her facial expressions again. “I really love what I do. It’s just because I got nervous and people are much better at doing this than I am.”

Summit Entertainment confirmed today that THE TWILIGHT SAGA: BREAKING DAWN will be released as two separate films with the first of the two slated to be released in theatres on November 18, 2011. Academy Award® winner Bill Condon will direct both films starring Kristen Stewart, Robert Pattinson and Taylor Lautner along with Billy Burke as Charlie Swan as well as returning members of the Cullen Family including Peter Facinelli as Carlisle, Elizabeth Reaser as Esme, Jackson Rathbone as Jasper, Nikki Reed as Rosalie, Ashley Greene as Alice and Kellan Lutz as Emmett.

The project, based on the fourth novel in author Stephenie Meyer’s Twilight series, is currently being written by Melissa Rosenberg with Wyck Godfrey, Karen Rosenfelt and Stephenie Meyer producing. The TWILIGHT SAGA: BREAKING DAWN will start production in the Fall.

THE TWILIGHT SAGA: BREAKING DAWN illuminates the secrets and mysteries of this spellbinding romantic epic that has entranced millions.