Prince Harry has reached the summit of the Sydney Harbour Bridge to raise the Invictus Games flag after a 13-minute climb.

He replaced the New South Wales standard at the top of the bridge which is 440ft above the water.

Among those joining the duke and prime minister Scott Morrison at the summit were three Australians who will be showing what they are made of at the Games, which open on Saturday.

Luke Hill, a swimmer, who was deployed to Timor-Leste three times, Captain Ruth Hunt, who will take part in the indoor rowing and swimming, and Peter Rudland, who was deployed to Cambodia, twice to Iraq, twice to Timor-Leste and Afghanistan, and will compete in the cycling and wheelchair rugby, all made their way to the top of the bridge for the flag ceremony.

Also climbing the structure built in 1932, was Gwen Cherne, who is an ambassador for the Games.

Her husband Peter Cafe served in Cambodia, Afghanistan and Iraq and took his own life in February this year. Since then, Ms Cherne has become an Invictus and War Widows Guild ambassador.