Kaitlyn Dever

Belle Gibson

Lady Gaga

Self

Alycia Debnam-Carey

Milla Blake

Aisha Dee

Chanelle

Bruno Mars

Self (voice)

Mark Coles Smith

Justin

Tilda Cobham-Hervey

Lucy

Chai Hansen

Arlo

Michael Polansky

Self - Guitar

Matt Nable

Joe

Ashley Zukerman

Clive

Essie Davis

Natalie Dal-Bello

Amelie Mendoza

Anais