Cameron Diaz, Bruce Willis Show Signature Reluctance

Attention, autograph hounds! Don't bother asking "Charlie's Angels" star Cameron Diaz to sign your book. Instead, head straight for "Pirates of the Caribbean" captain Johnny Depp with that Sharpie!

Depp, who doesn't appear to be the most approachable kind of guy, tops Autograph Collector maggie's list of 10 Best Celebrity Signers - for the second year in a row. "Syriana" stars George Clooney and Matt Damon are next on the list.

Diaz, who plays such sweet chicks on the silver screen, is the worst signer, according to the mag, trumping both Bruce Willis and his ex, Demi Moore, for the honor.

While fame and fortune have turned the "Angel" into a "persistently terrible signer," Depp has been known to sign autographs "for crowds at the airport while carrying luggage," reports mag editor Steve Cyrkin.

Diaz doesn't only deny to pen her name for a fan, "she'll lecture them about how dumb autographs are."

Always a crowd pleaser.

Clooney adds his charming sense of humor while autographing and "make(s) fun of how he looks in photos he's handed to autograph," Cyrkin said.

Willis, however, is notorious for not only refusing fans, but snubbing them in their attempt to get one. Obviously, he has a Sixth Sense about these things.

"Other actors say they don't sign autographs, but they stand there and talk, and are friendly," explained an autograph collector quoted by the mag. "Bruce won't even look at you, and he actually seems mad that you're bothering him."