Nash Edgerton Jack Director, Actor, Writer Rose Byrne Sofie Actor Krew Boylan Bridesmaid Actor Elly Hiraani Clapin Tourist Actor Laurence Coy Jack's Dad Actor Kieran Darcy-Smith Captain Rick Actor Brendan Donoghue Gary Actor Vanessa Downing Jack's Mum Actor Zumi Edgerton Flower Girl Actor Joseph Fala Island Waiter Actor Dylan Hare Bae Actor Glenn Hazeldine Celebrant Actor Mia Healey Darlin' Actor Hamish Michael Best Man Actor Tiriel Mora Sofie's Dad Actor Ioane Saula Ziggy Actor David Michôd Writer