Billy Boyd

Seamus (voice)

Luenell

Milly (voice)

Stephen Root

Grampa (voice)

Ricky Gervais

Flippy (voice)

Laraine Newman

Scientist (voice)

Isla Fisher

Sarah Hatoff (voice)

Cheri Oteri

Mayor (voice)

Peter Hastings

Dog Man / Officer Knight / Harold's House (voice)

Director

Kate Micucci

Dippy (voice)

Maggie Wheeler

Nurse (voice)

Pete Davidson

Petey the Cat (voice)

Lil Rel Howery

Chief (voice)

Melissa Villaseñor

Realtor (voice)

Poppy Liu

Butler (voice)

Lucas Hopkins Calderon

Li'l Petey (voice)