Cougars take note!

He may be dating Kristen Stewart--who turns 21 on Saturday -- but Robert Pattinson used to be into much older women in Hollywood.

"I was always obsessed with Kate Moss," the Water for Elephants star, 24, says of the British Supermodel, 37, in the new issue of Elle magazine. "On my bedroom wall I had a poster of [Exorcist star] Linda Blair and Kate Moss."

Also making his May-December romance wish list: "I always liked Jane Fonda [who's now 73]. Who else? Ellen Burstyn [78]."

These days, the modern matinee idol could woo any A-list actress of any generation, but his heart belongs to Twilight costar Stewart. Still, there is one thing even Stewart couldn't get Pattinson to do."Dancing is my Achilles' heel --I don't even try," he said. "It's like, 'Come on, dance!' 'No, I'm not getting up!' I can freestyle by myself with no one watching. I'm a great dancer then."

Perhaps Pattinson is being modest? Back in February, an eyewitness watched Pattinson and his love Stewart cut a rug at a pre-Oscars bash at L.A.'s Chateau Marmont. The hot couple were "dancing the whole time," the observer told The highlight of their dance-a-thon, says the witness: "They went nuts for 'Empire State of Mind!'"