Will Forte as Tim Willoughby (voice)

Maya Rudolph as Nanny (voice)

Alessia Cara as Jane Willoughby (voice)

Terry Crews as Commander Melanoff (voice)

Martin Short as The Father (voice)

Jane Krakowski as The Mother (voice)

Seán Cullen as Barnaby Twins (voice)

Ricky Gervais as The Cat (voice)

Fiona Toth as Travel Agent (voice)

Islie Hirvonen as Perfect Daughter (voice)

Colleen Wheeler as Social Worker (voice)

Bonnie Riley as Mikelina (voice)

Robyn Ross as Real Estate Agent (voice)

Shannon Chan-Kent as Baby Ruth (voice)

Rebecca Husain as Sweetie (voice)

Cristina Rosato as Reporter (voice)

Alistair Abell as Additional Voices

Emily Delahunty as Additional Voices

Jordan Hemsley as Additional Voices

Eliza Norbury as Additional Voices

Cristina Rosato as Additional Voices

Jason Simpson as Additional Voices

Laird Scaba as Additional Voices

Rondel Reynoldson as Additional Voices

Cole Howard as Additional Voices

Paul Dobson as Additional Voices

Caitlyn Bairstow as Additional Voices