Calling all Callies! Sara Ramirez, who plays the curvy Dr. Torres on Grey's Anatomy, is taking a stand for full-figured women. She's been signed by Dove to introduce a homemade ad as part of its provocative campaign featuring real people (spots can be submitted to by Jan. 15). Ramirez - who will present the winner on a commercial break during ABC's Feb. 25 broadcast of the Academy Awards - is glad to be a role model for those bigger than a size 0. But sometimes she finds it a challenge. "I'm a flawed human being, someone who continues to deal with my body image and what my purpose is on the planet," she says.

Read the rest of Ramirez's candid interview in the Jan. 15 issue of TV Guide magazine.

Reporting by Ileane Rudolph