Katherine McPhee, Jessica Chastain
Credit: Splash news; NPG

Welcome to Hollywood, little guys! Katharine McPhee toted her adorable chihuahuas, Nena and Larry, to the set of Smash yesterday morning, while just-announced Oscar-nominated Jessica Chastain took her three-legged pup for a stroll over the weekend. See these and more of Hollywood's famous furry friends in the gallery.