Meghan Markle with Sethunya Gibbons and family. Picture: Bang Showbiz

Prince Harry introduced his wife Meghan - who is pregnant with the couple's first child - over to speak to a little girl, who he thought looked the spitting image of Meghan when she was younger.

And Prince Harry kindly snapped a group photo of Sethunya Gibbons - who was wearing a shirt which read "girls can do anything" - and Meghan as the Royals completed a walkabout at the Sydney Opera House.

Someone in the crowd told Meghan they thought the girl looked like her, and she replied: "I was literally about to say the same thing. You remind me so much of myself when I was younger. And I love your shirt."

And Sethunya spoke of the family's excitement at meeting the Duke and Duchess of Sussex.

She told 2dayfm: "When Harry came over to me, he came over first, he said 'girls can do anything' because that's what it says on my shirt. Then he asked me if I wanted to meet his wife so I said 'yes' and then he asked me if I wanted him to take a photo of me and Meghan."

Harry, 34, and Meghan, 37, announced that they are expecting their first baby together on Monday.