Here’s a beauty under the big top!

Stunner Reese Witherspoon can light up a three-ring circus just as well as a red carpet, as she did last night at the Ziegfeld Theatre premiere of “Water for Elephants.”

In the flick, she plays a star circus performer who falls for a veterinary student played by Robert Pattinson.

They share a love for each other on the screen, and for the circus’ special elephant.

Based on the novel by Sara Gruen, the movie opens nationally Friday.