Never been happier! Delighted Meghan and Harry step out on the first official engagement of their tour to Australia

Meghan Markle and Prince Harry couldn't hide their delight as they stepped out on the first official engagements of their tour to Australia on Tuesday morning.

Insiders have said Prince Harry is "happier than he has ever been" as he and Meghan prepare to become parents next Spring. He has been an "emotional wreck - but in a good way!" since discovering the Duchess of Sussex is pregnant, one source said Monday night.

The source added:

It is something he has wanted for a long time and he couldn't be happier. He is so protective of her.

The beaming couple stepped out on Tuesday morning, hours after revealing their baby news, for a packed day of engagements, which included being introduced to their koala namesakes and a "stud" of a short-legged echidna, as they admired the "so cute" wildlife of Taronga Zoo.

Departing, the couple were treated to a ride in a gondola, giving spectacular views over Sydney Harbour and allowing a glimpse of other animal enclosures, including a curious baby elephant, below.

After the visit to Taronga Zoo the Duchess changed into flat shoes and they walked the short journey down a ramp and out of the zoo. The Duke and Duchess of Sussex climbed aboard a ferry for a 20-minute crossing of the harbour to the Sydney Opera house surrounded by armed security.

The royal couple were greeted by a sea of well-wishers at the Opera House, where they mingled with the crowd. Meghan shared a touching moment with one young girl, and said: "Thank you all for the big welcome."

Earlier, Meghan and Harry were at Admiralty House, the official Sydney residence of the Governor-General of Australia, where they are staying for the first few days of their marathon 16-day Commonwealth trip.

The couple met Governor-General Peter Cosgrove and his wife, Lady Cosgrove. They gave the couple a toy Kangaroo and its Joey, to which Meghan exclaimed: "Our first baby gift!"

Harry also looked delighted with a pair of baby Uggs, which were originally worn by surfers when they emerged from the sea before becoming fashionable.

The royal couple also received Akubra hats from Australia's Governor-General Sir Peter Cosgrove and his wife Lady Cosgrove on Tuesday morning but they declined a chance to put the Akubra hats on while inside Admiralty House.

More photos below.

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