updated 12/08/2011 AT 4:00 PM ET
•originally published 12/08/2011 AT 4:30 PM ET
Katherine Heigl may have been the celebrity guest on The Tonight Show Tuesday, but it was the actress who walked away star-struck.
“How cute is that little dog?” she says in a backstage video where she cuddles the Chihuahua and chats with owner Connie Baldwin. “He’s so sweet!”