 There are frequent impromptu "calls" from numerous characters voiced primarily by Steve Salge, Ron Sexton, and Dean Metcalf.Several guests usually join the primary cast each day in the studio or via phone or satellite, including numerous comedians who tour nationally.The show has frequently featured up-and-coming comedians who went on to become household names, including Ellen DeGeneres, Drew Carey, Louis CK, Jim Gaffigan, Daniel Tosh, George Lopez, Brad Garrett, Ron White, and Tim Allen.