Elsie Fisher, star of the indie hit Eighth Grade, was bound to score some plumb big movie role. And so she has, even if she?ll be heard but not seen. Fisher, 15, will voice a key role in MGM?s animated Addams Family movie, reports Variety. Fisher will be joining Oscar Isaac and Charlize Theron, as parents Gomez and Morticia, as well as Nick Kroll as Uncle Fester, Bette Midler as Grandmama and Chloë Grace Moretz as Wednesday, the most macabre of the ghoulish unit.