Meghan Markle shows off her post-baby body at surprise public appearance in London

While it hasn't even been two months since Meghan Markle welcomed her first child, Archie, into the world, the royal mum surprised fan as she stepped out today to accompany her husband Prince Harry to the Boston Red Sox vs New York Yankees baseball game at the London Stadium in support of the Invictus Games Foundation.

The 37-year-old former actress took a brief break from maternity leave and showed off her post-baby body, looking gorgeous in a black Stella McCartney dress with matching Aquazzura Deneuve ballet flats in black suede.

During the couple's appearance at the game, which is the first Major League Baseball game to be played in Europe, the visited both team's changing rooms where they were gifted with adorable mini jersey babygrows and a mini baseball bat for Archie.

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Harry and Meghan also took to the field to observe the ceremonial opening pitch, posing with members of the Invictus Games Foundation.

Bianca Rainbow-Jones - was there to support her husband, Nathan Jones, who is in the Air Force - later revealed that Harry had confessed they had had "a sleepless night."

Despite making the rare outing, the Duchess of Sussex, who has only made a handful of public appearances since giving birth, is not expected to end her maternity leave until later this year.

However, royal fans may see her again soon if she decides to attend Wimbledon in support of her good friend Serena Williams.