Prince Harry will be attached to several Australian Army units over the next month - one of his last duties as a British soldier before retiring in June.

The veteran of two deployments to Afghanistan starts his assignment on Monday as a VIP dignitary - laying a wreath on the Tomb of the Unknown Soldier at the National War Memorial in Canberra.

He will also meet Governor-General Peter Cosgrove, tour the Afghanistan and World War I galleries of the memorial and then greet the public.

He will then report for duty at Defence headquarters at 10.30am, the official start of his attachment to units in Darwin, Perth and Sydney.

The prince will also travel to Gallipoli to represent the royal family at the Anzac Day dawn service along with his father, Prince Charles.