LONDON, ENGLAND - JUNE 29: Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex pose for a group photo with the Boston Red Sox before a game against the New York Yankees at London Stadium on June 29, 2019 in London, England.
While the couple didn't bring Baby Archie to the outing, they were gifted adorable outfits for him from each team, and the mini Yankees jersey even has his name emblazoned on the back.
And the pair looked loved up as ever as they were pictured gazing into eachother's eyes longingly at the Stratford stadium.
The couple was also accompanied by 10 Invictus participants.
She made the most of the glorious sunshine in a black Stella McCartney dress with a belt and flat shoes. Harry's Invictus Games Foundation is the charity partner for the MLB London Series.
Former Invictus competitors from both the US and United Kingdom will take part as the ceremonial first pitch is thrown on the ball park.
This marks the first time an Major League Baseball game has been played in Europe.
Aaron Hicks capped the six-run spread with a two-RBI, 385-foot home run, also the first of its kind by any Major League Baseball player in Europe.
Prince Harry founded the Invictus Games for wounded, injured or sick armed services personnel and veterans from all over the globe to compete in various competitions.