Australia's royal wedding gift -Akubras

Malcolm Turnbull said the country's wedding gift to Prince Harry and Meghan Markle would be typically Australian, and he wasn't kidding.

The couple, who marry at Windsor later on Saturday, will each be given an Akubra hat when they visit Sydney for the Invictus Games in October.

The prime minister said on social media that Australia would also be making a donation to Invictus "in honour of your wedding".

"Congratulations Harry & Meghan on your wedding day. With our very best wishes for a long and happy life together, Malcolm and Lucy."

On Friday, the NSW government announced two newborn koalas at Taronga Zoo would be named after the royal couple.

Although the sex of the joeys isn't yet know, one will be Meghan and one will be Harry.