Bob Saget celebrated his official opening night as a cast member of the Broadway play Hand to God on Friday and met up backstage with none other than Ashley Olsen who shared the role of his youngest daughter on the '80s and '90s sitcom Full House with twin sister Mary-Kate Olsen . Saget posted on his instagram "Loved having my dear friend Ashley Olsen at my welcoming opening of @HandToGodBway last night with the brilliant cast I get to act with"