Hayden Panettiere showed off a bold new look for her "Late Show with David Letterman" appearance Wednesday.
The 24-year-old actress was nearly unrecognizable with stick-straight platinum hair, blunt bangs and bright red lipstick.
She paired her edgy new look with a skin-tight mini dress that showed off her slender figure.
Panettiere's transformation is a huge departure from her usual laid-back boho style.
Perhaps it has something to do with her character Juliette Barnes on ABC's "Nashville." Or maybe on-again, off-again boyfriend boxer Wladimir Klitschko had some say in her new style.