Weaving will join Andrew Garfield, Sam Worthington, Vince Vaughn, Rachel Griffiths and Richard Roxburgh in the film, which is now in production.
Hacksaw Ridge is the true story of conscientious objector, Desmond Doss (Garfield), who, in Okinawa during the bloodiest battle of WWII, saved 75 men without firing a gun..
Believing that the War was just but killing was nevertheless wrong, he was the only American soldier in WWII to fight on the front lines without a weapon.
Doss single-handedly evacuated the wounded near enemy lines, braved fire while tending to soldiers and was wounded by a grenade and hit by snipers. He is the only conscientious objector to ever win the Us Medal of Honour.
Weaving will play Garfield's son, Tom Doss.
Producers of the film include Bill Mechanic, Bruce Davey, Paul Currie, David Permut and executive Producer,