If there’s a vocal equivalent of rubber face, Hank Azaria’s got it. The 50-year-old actor joined The Simpsons when he was just 22, and has collected four Emmys for an impossibly long list of oft-imitated and diverse creations: Moe, Chief Wiggum, Professor Frink, Dr. Nick Riviera, Apu, Cletus—and on and on. To mark the show’s 25th season, and the 552-episode marathon on FXX that threatens to keep fans in doors for days, Azaria talked to TIME about what it’s been like to embody some of the funniest characters on television for more than half-a-lifetime—as well as what he remembers about the late, great Robin Williams, with whom Azaria worked on the 1996 comedy The Birdcage. TIME: Are you going to be watching any of the [FX] marathon?