'New Moon's' Painful Heartbreak

Kristen Stewart says it 'killed' her to break hearts in 'New Moon'

Breakups are never easy, especially in the world of "Twilight." Kristen Stewart says it "killed" her to break hearts on film.

"It's like, people don't just break up [in the "Twilight" films]. They break up and it literally kills you," Stewart tells MTV News. "It's not like you just say, 'Oh, I'm really depressed and crying.' Everything is supposed to be a fantasy version of that."

In the upcoming "The Twilight Saga: New Moon," Stewart's character Bella tells Jacob (Taylor Lautner) that she has feelings for vampire Edward (Robert Pattinson). "My favorite line in the book is when I have to say to Jacob, 'It's him; it's always been him!'" Kristen confesses. "Yeah, it killed me. It killed me."

Lautner agrees with Stewart. The buff hunk tells MTV News that "New Moon" is "very complicated... there's a lot of heartbreak, there's a lot of things going on. Edward leaves at the beginning, she goes into this depression, I come to try and bring her out of it."