Harry has long been a patron of the Invictus Games, which allows wounded and disabled veterans to compete in sports. Earlier this month, the couple attended the U.K. team trials for the games in Bath, England.
Last year’s games in Toronto, Canada, marked the first public event where Harry, 33, and Meghan, 36, made a joint appearance. They’ve since gone on to make numerous public appearances following their fall engagement.
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Meghan Markle's Wedding Is Here...on 'Suits' -- Get a First Look!
Later on Saturday, Markle and Harry are expected to join the rest of the royal family to celebrate the queen’s 92nd birthday with a special concert at the Royal Albert Hall.
The concert, known as The Queen’s Birthday Party, will be attended by Queen Elizabeth II and other members of the royal family. Performers include Sir Tom Jones, Kylie Minogue, Sting and Shaggy, Shawn Mendes, Ladysmith Black Mambazo, Anne-Marie, Craig David and Donel Mangena.
See more on Markle in the video below, and keep up with all of ET's coverage of the Royal Wedding as we count down to May 19!