ET helped celebrate Stamos' birthday by surprising him with baklava on the set of his new Fox sitcom, Grandfathered. Guest star Richie Sambora pitched in during the surprise celebration, singing "Livin' on a Prayer."
On the upcoming comedy, Stamos plays a playboy restauranteur who meets a twentysomething son he never knew he had. Making matters more complicated, his son has a daughter, making Stamos' character an instant grandfather.
The show uses twin toddlers to share the role of Stamos' granddaughter on the show, not unlike how the Olsen twins Mary-Kate and Ashley played Michelle Tanner on Full House.