Mackenzie Brooke Smith (born February 6, 2001) is an American actress, most notable for her recurring role on Terminator: The Sarah Connor Chronicles as Savannah, the daughter of Catherine Weaver. She also appeared in the 2016 motion picture The Family Fang, alongside Kathryn Hahn and Jason Bateman. Smith can also be seen guest starring in television series like Grey's Anatomy, 100 Things to Do Before High School, Desperate Housewives and The Middle.