Ruth Buzzi

as Nandy (voice)

Charlie Adler

as Streamer / Mojo / Big Red (voice)

Max Casella

as Cro (voice)

Candi Milo

as Pakka (voice)

Jim Cummings

as Phil / Ogg / Murray (voice)

April Ortiz

as Dr. Cecilia (voice)

Frank Welker

as Gogg / Earle (voice)

Jussie Smollett

as Mike (voice)