Hollywood's Sweetest Family #Ussies

From Gwen Stefani to Hilary Duff, see which stars are having fun snapping pics with their adorable tots

BILL RANCIC

Someone's thirsty! The E! reality star helps his 1½-year-old son Duke stay hydrated during a father-son outing. "1st time for everything!! #theduke" Rancic wrote.