She said: "I never really thought about it. But it’s okay, he’s gonna be a pretty foxy grandpa. If you have a grandpa, I’d want one that looks like him."
Jennie, who has three daughters with the Twilight hunk, says she and the girls will miss him during filming but that they can't wait for the return of the Carlisle Cullen wig.
She added: "They’re gearing up for when Peter dons a Carlisle wig."