Reese Witherspoon: I'm a 'Consolation Prize' for Pattinson Fans

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She calls his fame "incredible" at the NYC premiere of "Water for Elephants" Sunday.

Reese Witherspoon couldn't believe Robert Pattinson's fans would line up until 5 a.m. to catch a glimpse of him while they were shooting Water for Elephants.

"[It's] incredible. Their dedication to the movie, the book, Rob!" she joked to MTV News at the NYC red carpet premiere of her film, which will be released in theaters April 22. "I'm like a consolation prize." PHOTOS: Reese and Rob on the set of Water for Elephants.

Witherspoon -- who plays a circus performer who calls for Pattinson, a veterinary student in the film, based off Sara Gruen's book -- compares Pattinson to Leonardo DiCaprio during his Titanic heyday.

She says she's thrilled not to have to walk as many red carpets as the Twilight star.

"I do it once a year," she says, but admits "it's nice" to meet fans because filming is "so isolated."