Prince Harry looked smart in a white t-shirt, blue jeans, a navy jacket and a pair of grey slip-on trainers. Many royal fans loved Meghan’s look and went on social media to express their adoration.

One user wrote on Instagram: “Just casual, simple and fabulous.” Another one agreed: “She looks fabulous. Just hope she doesn’t drop anything and have to pick it up.”

A third one said: “Meghan looks so darned cute. The dress is adorable and the accessories work beautifully. Plus she looks super happy. They all look great while supporting a good cause.”

A fourth one commented: “Love this look! So cute and chic!!”

A fifth one chimed: “So gorgeous in its simplicity. Perfection.”

Ms Zajfen and her family thanked the couple for their support in what was dubbed an “incredible day” that was filled with “emotions and lots of love”.

The post added that the event raised funds that will “directly support children in foster care, ensuring they have the legal protections, resources and opportunities they deserve in honour of our beautiful son Georgie.”

It added: “To our Presenting Sponsors, The Archewell Foundation. Harry and Meghan, you have been such a guiding light for our family not just In the way you have shown up in friendship but how you have shown up through the incredible work The Archewell Foundation does every day.

“I’m in awe of your commitment to community and to friendship. On behalf of the Alliance for Children’s Rights, we thank you. On behalf of our family, we love you.

“Extra special day too…HAPPY 40th Birthday H! May this trip around the sun be the best yet.”