Animal-rights group PETA has taken aim at the Olsens for wearing fur, labeling Mary-Kate and Ashley the "Trollsen Twins" in a new ad campaign!

The group, furious at the tiny moguls for using fur in their fashion collections, will unveil their new ad at the Hollywood Walk of Fame today.

The group also labels the girls "Hairy Kate" and "Trashley" and insists in their new tag line, "Fur Is Worn by Beautiful Animals and Ugly People."

Click on an image to view the MARY-KATE AND ASHLEY OLSEN photo gallery!