Stephen Stanton
Smitty / Needleman / Sanderson (voice)
Alanna Ubach
Cutter (voice)
Lucas Neff
Duncan (voice)
Billy Crystal
Mike (voice)
Ben Feldman
Tylor (voice)
Mindy Kaling
Val (voice)
Henry Winkler
Fritz (voice)
John Goodman
Sulley (voice)
Christopher Swindle
Phlegm (voice)
Bob Peterson
Roze (voice)
Romi Dames
Additional Monsters (voice)
Dee Bradley Baker
Banana Bread (voice)
Bobs Gannaway
Roto (voice)
John Ratzenberger
Bernard (voice)
Bonnie Hunt
Ms. Flint (voice)
Jennifer Tilly
Celia Mae (voice)
Nathan Fillion
Johnny (voice)
Rhys Darby
Roger Rogers (voice)
Michaela Dietz
Additional Monsters (voice)
Carlos Alazraqui
Rudy the Service Monster (voice)
Aisha Tyler
Millie (voice)
Bobby Moynihan
Chet (voice)
Max Mittelman
Scared Monster / Convention Monsters (voice)
Jenifer Lewis
Grandma Tuskmon (voice)
Ali Wong
Jill (voice)
Joe Lo Truglio
Jack (voice)
Roxana Ortega
Celia Mae (voice)
Nohely Quiroz
Gangly Kid / Additional Monsters (voice)
Curtis Armstrong
Mr. Crummyham (voice)
Alan Kim
Ben (voice)
Paula Pell
Sunny (voice)
Corey Burton
Slappy (voice)
Richard Ayoade
Declan (voice)
Janelle James
Joy (voice)
Aubrey Plaza
Claire (voice)
Kimberly Brooks
Additional Monsters (voice)
Kurtwood Smith
Alistair Clawbottom (voice)
Jimmy Tatro
Skyler (voice)
Alan Tudyk
Pierre / Michel / Maître d' (voice)
Alfred Molina
Professor Knight (voice)
