Will Ferrell Cries Over Kristen Stewart, Robert Pattinson on 'Conan' (Video)

Will Ferrell Crying About Kristen Stewart - H 2012

Will Ferrell Crying About Kristen Stewart - H 2012

It wasn't a good time for Will Ferrell to get emotional, but how can you blame him?

Ferrell's whistle-stop tour to promote his new film The Campaign brought him to old friend Conan O'Brien's show on Thursday, but instead of the normal, scripted banter Ferrell usually peddles, he found himself baring his soul. The knife in his heart? Kristen Stewart's admission of cheating on Robert Pattinson, her on-and-off screen vampire beau, with Snow White and the Huntsman director Rupert Sanders.

PHOTOS: Will Ferrell, Zach Galifianakis Premiere The Campaign

"She cheated on him, and they're broken up," he explained, fighting through tears, a valiant yet futile effort. "They're not going to get back together ever. And what they had was so special Conan, you don't even know what they had. They were in love, and she just threw it all away! I don't know if there was anything I could have done to prevent it, I don't know what it means to the Twilight franchise, I just don't know."

It was startling to watch, to say the least: a man chased by his emotions, with nowhere to turn but the bright lights of national television.

Perhaps Pattinson can address the issue himself on Conan; his representative announced that he would still take part in a promotional tour for his new film, Cosmopolis.