Prince Harry and Duchess Meghan are having the time of their lives on day one of their royal tour

Harry's face says it all - they're having a ball!

Duchess Meghan could not stop laughing as she and Prince Harry came face-to-face with some of Australia's more unique fauna - including a couple of mama koalas with some interestingly named offspring.
Harry and Meghan were visiting Taronga Zoo in Sydney as part of their royal tour - and among their many special introductions, they met Ruby and Wattle, both koala mums to kids (or joeys) called Harry and Meghan, to commemorate the royal visit.
The royal parents-to-be lean in for the koala pat.
Meghan can't stop giggling - but the koala remains unfazed.
The royals travelled to Sydney's Taronga Zoo where they officially opened the new Taronga Institute of Science and Learning.
The Institute is a purpose-built research and education centre on site at Taronga Zoo Sydney and the first of its kind in the Southern Hemisphere, housing the largest conservation science team of any zoo in the Australasia.
Prince Harry gets up close and personal with Aussie wildlife.
As The Royal Highnesses hightail it around Sydney, they couldn't have looked happier following last night's exciting announcement that they are expecting a baby in autumn.
Wearing a stunning white dress, named the 'Blessed' dress by Australian designer Karen Gee, the fitted style gives royal baby-watchers a look at Meghan's new baby bump.
And royal watchers are obviously loving the dress, because as soon as it was identified fans jumped online to purchase it, causing the Karen Gee site to momentarily overload.
Harry and Meghan have also made sure to engage with as many locals as possible. And as always they love to talk to the children - in this case it was four-year-old Findlay Blue and six-year-old Dasha Gallagher after the royals had opened the institute.
Harry and Meghan have a renowned rapport with the public who flock to meet them, including children like Findlay (right) and Dasha.
In her high heels and body-con dress Meghan gets down to Findlay's level to receive a posy of Australian natives.
Earlier the Duke and Duchess of Sussex were at Admiralty House where the queen's representative in Australia Governor-General Peter Cosgrove and his wife Lady Cosgrove presented them with a number of little gifts, including a stuffed kangaroo and a pair of Akubra hats.
But it was the third little gift — a pair of baby ugg boots for their own little royal joey — that brought a huge smile to Harry's face.
We can't wait to see what day two has in store for Harry and Meghan!