Christopher Lloyd in 2017
By the time he filmed his scenes as Uncle Fester, Christopher Lloyd was already a household name. His role on the TV series Taxi earned him a pair of Emmys for supporting actor in a comedy. But it was his role as Doc Brown in Back to the Future that made an indelible mark on pop culture.
After The Addams Family, Lloyd continued on a widely varied career, doing everything from film to television to theater. Among his more notable credits are Who Framed Roger Rabbit, Clue, and Star Trek III: The Search For Spock. In more recent years, he's reprised his role as Doc Brown for sketches and supplementary media and popped up in cameo appearances; his most recent such role was on Roseanne in early 2018.