Toni Collette

Mary (voice)

Philip Seymour Hoffman

Max (voice)

Barry Humphries

Narrator (voice)

Eric Bana

Damien (voice)

Bethany Whitmore

Young Mary (voice)

Renée Geyer

Vera Lorraine Dinkle (voice)

Ian 'Molly' Meldrum

Homeless Man (voice)

John Flaus

Harvey Krumpet / Ken / Len Hislop (voice)

Christopher Massey

911 Operator / Ambulance Voice / Derisive Observer (voice)

Adam Elliot

Various Voices (voice)