The Duchess of Sussex met Commonwealth scholars to hear about their commitment to tackling global challenges, ahead of her final official public duty as a senior royal.
Meghan, in her role as patron of the Association of Commonwealth Universities (ACU), chatted with the students at Buckingham Palace, before the Commonwealth Service at Westminster Abbey on Monday.
Timothy Biswick, a University of Leicester research fellow who is looking at microplastic pollution in the oceans, said: "She knows what she's talking about in terms of climate change.
"She was talking about things in quite some detail, so you know that this person knows what they are talking about and are passionate about it."
Newly-released photographs show Meghan, who was wearing a fitted navy cap-sleeve dress with neck scarf detail, listening to one scholar, and in the centre of a group photo in the 1844 Room of the Queen's London home.
The images were taken by her wedding photographer, Chris Allerton.
Addressing the scholars, who were split into four groups to look at different global challenges, she said: "Everyone is connected because of this very holistic approach to tackling climate change.
"I love how solution-based you all are."
Meghan was made royal patron of ACU in January 2019, taking over from the Queen, who held the post for 33 years.
A source said: "She was thrilled to have the chance to meet inspirational scholars doing ground-breaking work in the fields of climate and the environment, sustainable cities, health and innovation and technology."
After walking away from the monarchy on March 31, the duchess will continue her links to ACU as patron.
The behind-the-scenes meeting took place during the duchess' farewell tour, which culminated in Meghan and the Duke of Sussex appearing alongside other members of the royal family at the Abbey.
Joanna Newman, secretary general of the ACU, said the duchess's understanding of the value of higher education was a key part of her association with the charity.
"She's a very powerful spokesperson for us," she said.
The students included Commonwealth Scholars, an ACU Blue Charter Fellow and Chevening Scholars from 11 Commonwealth countries - Malawi, India, Cameroon, Bangladesh, Nigeria, Pakistan, Ghana, Rwanda, Kenya, Malaysia and Sri Lanka.
Meghan is reported to have flown back to Canada soon after the Commonwealth Service.
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