Robert Pattinson will tell all to Ellen DeGeneres on her show later today. Pattinson will appear on 'Ellen' to dish about his upcoming "Twilight: Eclipse" movie—and of course, his new haircut.

The hunk joked with Ellen about his new buzz cut: 'I got a terrible infestation of nits and I had to shave it all off.'

Press reports claim that the charming Pattinson also told Ellen: "I just like doing things where you have a little time to think about what you’re saying. I’ve always had a problem actually thinking before I open my mouth," said Pattison. "Yeah, being spontaneous or just thinking. I have a problem with thinking."

"Just thinking, period?" asked Ellen, who looked like she thought he represented beauty but not brains. "Thinking in real time," clarified Pattinson.

Robert Pattinson to appear on 'Ellen'