Rachel Griffiths plays Doss ' mother in the Hacksaw Ridge .
Despite being American-born , Gibson 's early years in Australia helped the film qualify , along with most of the cast being Australian , including Rachel Griffiths ( Doss 's mother ) , Teresa Palmer ( Doss 's wife ) , Sam Worthington ( unit leader ) , Hugo Weaving ( as Doss 's father ) , Richard Roxburgh ( as a colonel ) and Luke Bracey ( as Smitty , one of Doss 's most antagonistic unit members ) .
Hacksaw Ridge