'Eclipse' star Kristen Stewart made a grand entrance when she showed up for her 'Late Show With David Letterman' appearance in New York City earlier today. But it wasn't her short, one-sleeve black and silver dress that got everyone buzzing--it was her new, short auburn locks!

The actress, known for her shoulder-length dark brown tresses, surprised photographers and fans alike when she arrived to the Letterman show sporting a new cut and color. Stewart, who was photographed as recently as yesterday with brown hair, is in the middle of a huge press tour promoting the release of the latest in the Twilight saga, 'Eclipse.'