Louis C.K. Max (voice) Eric Stonestreet Duke (voice) Kevin Hart Snowball (voice) Jenny Slate Gidget (voice) Ellie Kemper Katie (voice) Albert Brooks Tiberius (voice) Lake Bell Chloe (voice) Dana Carvey Pops (voice) Hannibal Buress Buddy (voice) Bobby Moynihan Mel (voice) Chris Renaud Norman (voice) Steve Coogan Ozone / Reginald (voice) Michael Beattie Tattoo (voice) Sandra Echeverría Maria (voice) Jaime Camil Fernando (voice) Tara Strong Additional Voices (voice) Jason Marsden Additional Voices (voice) Mona Marshall Additional Voices (voice) Brian T. Delaney Additional Voices (voice) Bill Farmer Additional Voices (voice) Jan Rabson Additional Voices (voice) Ken Schretzmann Additional Voices (voice) John Kassir Additional Voices (voice) Danny Mann Additional Voices (voice) Jim Ward Additional Voices (voice) Bob Bergen Additional Voices (voice) Jim Cummings Additional Voices (voice) Jess Harnell Additional Voices (voice) Laraine Newman Additional Voices (voice)