The young Williams, she of Marnie fame from Girls, finally has her first beauty ad campaign. It's with Simple, a British skincare line that entered the U.S. market last year but hadn't yet found a young actress to call its own. This seems like a good fit — Allison wears makeup on television! And, sometimes, it has to be taken off! All jokes aside, she's got one of those pretty faces that'll look good whilst getting splashed with water. Next up: perfume endorsement?