'Twilight' star Robert Pattinson tells Ellen DeGeneres on her show Friday that he's single and reveals his theory as to why!

I am [a relationship guy] but nobody seems to want to get in a relationship with me," he says humbly amidst screaming audience members. "It's strange."

"People like screaming at me -- and they like screaming at me in relationships," he says. "But nobody wants to commit!"

But Ellen reassures him, "I think somebody will commit, don't you worry about that. You have lots of choices."

To find out whether Rob almost gave up acting before his star-making turn in 'Twilight,' click here.