Beau Bridges as Gus Grisby

Bindi Irwin as Kirra Cooper

Matthew Dylan Roberts as Blikkies

Kevin Otto as Dr. Sam Cooper

Darron Meyer as Doctor

Bongo Mbutuma as Mansa

Siyabulela Ramba as Sifiso

Stephen Jennings as Rolf V.D. Woods

Louw Venter as Diff

Hiema Jaffa as Jayce

Julie Hartley as Woman - Wallaby

Sue Dall as Female Customer

Sofie Schmidt as Whale Watching Girl

Matthew Kennedy as Kid - Kelp

Shiloh Henderson as Kid 2 - Kelp

Michelle Scott as Mom - Kelp

Bruce Young as Male Marine Biologist

Claire Berlein as Female Marine Biologies

Getmore Sithole as Uncle Rudy

Mfundo Tshazibane as Groundskeeper

Robert Spencer as Nerdy Boy

Tracy Kitching as Waitress

Rosco Charles as Teenage Putt-Putter

Chumani Pan as Gate Guard

Linda Mpondo as Policewoman

Jeanne Neilson as Airport Hostess

Robert Clarence Irwin as The Pirate Boy (uncredited)