'Twilight' heartthrob Robert Pattinson had an interesting way of sidestepping Oprah Winfrey's question of whether he's dating his shy costar Kristen Stewart.

"Kristin's pregnant," Pattinson jokes on "The Oprah Winfrey Show," never actually answering the question.

"He really loves to shock people," Stewart says of Pattinson. The vampire hunk and teen wolf Taylor Lautner went door-to-door to surprise fans of all ages, inviting them to Oprah's 'Twilight' special.

One thing that Pattinson did fess up to was what he does on Saturday night. The actor says on the weekends he "desperately" calls everyone in his phone looking for someone to hang out with him. Lautner also admits he rarely has plans on Saturday night, while Stewart says she hangs out with her cat as much as she can.

Catch Pattinson, Stewart and Lautner in the highly anticipated 'The Twilight Saga: Eclipse' when it hits theaters June 30.

Related stories: 'Eclipse' Sneak Peek: Bella's Engagement Ring!  New Trailer: Sexy Beasts Clash in 'The Twilight Saga: Eclipse'