Sarah Snook as Grace (voice)

Kodi Smit-McPhee as Gilbert (voice)

Jacki Weaver as Pinky (voice)

Magda Szubanski as Ruth Appleby (voice)

Dominique Pinon as Percy Pudel (voice)

Tony Armstrong as Ken (voice)

Paul Capsis as Ian / Narelle (voice)

Eric Bana as James the Magistrate (voice)

Bernie Clifford as Owen Appleby (voice)

Davey Thompson as Ben Appleby (voice)

Charlotte Belsey as Young Grace (voice)

Mason Litsos as Young Gilbert (voice)

Nick Cave as Bill Clarke (voice)

Agnes Davison as Additional Young Grace (voice)

Daniel Agdag as Doctor (voice)

Saxon Wright as Bert (voice)

Selena Brennan as Annie Pudel (voice)

Adam Elliot as Denise Floyd (voice)

Smita Singh as Teacher (voice)

Braiden Asciak as Dwayne Appleby (voice)

Dan Doherty as Shayne Appleby / Canberra Courier (voice

Alexander Esenarro Santafe as Hector Santamaria (voice)

Hedley Elliot as Crossing Kid Hedley (voice)

Clancy Elliot as Crossing Kid Clancy (voice)

Grace Elliot as Crossing Kid Gracey (voice)

Luke Elliot as Headmaster / Security Guard (voice)

Jub Clerc as Nursing Home Resident Mavis / Sperm Nurse (voice)

Craig Ross as Craig Ross (voice)

Vicki Ross as Laughter Club Vicki (voice)

David Williams as Sylvia (voice)

Klaus Banadinovich as Additional Adult Voices (voice)

Charlotte Culshaw as Additional Adult Voices (voice)

Ruby Davis as Additional Adult Voices (voice)

Beryl Downing as Additional Adult Voices (voice)

Wilhelmina Elliot as Additional Kids Voices (voice)

Owen Grieve as Additional Adult Voices (voice)

Alyssia Jade as Additional Kids Voices (voice)

Caleb Lee as Additional Kids Voices (voice)

Veronica Lynch as Additional Adult Voices (voice)

Jaylen Nagloo as Additional Kids Voices (voice)

Devanjana Rajesh as Additional Kids Voices (voice)

Ruth Relf as Additional Adult Voices (voice)

Roger Savage as Additional Adult Voices (voice)

Flynn Wandin as Additional Kids Voices (voice)

Andy Wright as Additional Adult Voices (voice)

Lee Yee as Additional Adult Voices (voice)