Jack Dylan Grazer as Barney (voice)

Zach Galifianakis as Ron (voice)

Ed Helms as Graham (voice)

Olivia Colman as Donka (voice)

Rob Delaney as Andrew (voice)

Justice Smith as Marc (voice)

Kylie Cantrall as Savannah (voice)

Ricardo Hurtado as Rich (voice)

Cullen McCarthy as Noah (voice)

Ava Morse as Ava (voice)

Marcus Scribner as Alex (voice)

Thomas Barbusca as Jayden (voice)

Sarah Miller as Bree (voice)

Bentley Kalu as Cop (voice)

Krupa Pattani as Sita (voice)

John Macmillan as Bubble Techs (voice)

Megan Maczko as Miss Thomas (voice)

Ruby Wax as Ms. Hartley (voice)

David Menkin as Shayne The Biker / Mr. Cleaver (voice)

Iara Nemirovsky as Ellie (voice)

Tristan Allerick Chen as Additional Voices (voice)

Jadon Sand as Additional Voices (voice)

Octavio E. Rodriguez as Additional Voices (voice)

Flula Borg as Additional Voices (voice)

Phil LaMarr as Additional Voices (voice)