The Duchess of Sussex joined her husband, Prince Harry, for a walkabout on Fraser Island after taking the morning off from royal engagements.
They arrived on Fraser Island, the world's largest sand island, on Monday morning, following a busy week of engagements at different cities in Australia, before going their separate ways.
Prior to their arrival, Kensington Palace had confirmed Meghan would scale down on planned appearances, saying: "After a busy programme, the duke and duchess have decided to cut back the duchess's schedule slightly for the next couple of days, ahead of the final week-and-a-half of the tour."
Harry, 34, conducted the day's engagements on Fraser Island by himself while Meghan rested at their resort during the morning.
She isn't sick, she just had a tiring few days and we were concerned about the roads on the island which are incredibly bumpy and uncomfortable for anyone, let alone a pregnant woman.
Meghan then joined Harry for the last engagement of the day, where they strolled along the Kingfisher Bay Jetty and met with locals who had turned out to see them.
A royal aide told The Telegraph of Meghan: "She isn't sick, she just had a tiring few days and we were concerned about the roads on the island which are incredibly bumpy and uncomfortable for anyone, let alone a pregnant woman.
"But the duchess was very keen to re-join the duke at the last engagement of the day to greet the people of the island."
Meghan was pictured keeping one protective hand on her stomach as she held hands with her husband at the jetty on Sunday afternoon.
Earlier in the day, Harry took part in a traditional Welcome To The Country Smoking Ceremony and unveiled a plaque for the dedication of the Forests of K’gari to the Queen's Commonwealth Canopy.
He also met with local elders and park rangers to learn more about the island, before travelling to the beach to learn about the island's logging trade and history as a training base during World War II.
The Duke and Duchess of Sussex will spend a private evening together on Fraser Island before travelling on to Fiji on Tuesday morning.
From there, they'll continue to Tonga, back to Australia and then to New Zealand.
According to several royal correspondents, Meghan is "feeling fine" but her team are trying to "pace things for her."
A source told Sky News: "We have to try to pace her. We have to make sure she is well-paced and not overdoing it. She had a very late night last night. She wants to do everything, but Prince Harry is encouraging her to pace herself."
The news came after Meghan revealed to Emily Carroll - whose family live on Mountain View farm, which she and Harry visited last week - that she was due to complete 76 engagements in just 16 days during their tour.
Emily said: "Meghan told me that she's feeling pretty good so far, which is great, and that she's running on adrenaline.
"She said they're doing 76 engagements in 16 days, with maybe one rest in the middle. She's made for this royal business, isn't she?"
Meanwhile, Harry was overheard on Sunday suggesting he'd like a baby girl with Meghan.
The Duke of Sussex had been attending an event for his Invictus Games in Sydney on Sunday when a woman in the crowd called out, "I hope it's a girl!"
Harry appeared to reply: "So do I!"
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