The former Suits star attended last year's games in Toronto with Harry, and joined in again this year when she sheered on United Kingdom athletes at the trials.
According to them, Harry was keen to check in on his new wife, asking, "Okay?" before the flypast began.
'Harry, Camilla, Kate, along with [Prince] Charles, with whom she has developed a particularly close bond, have all been doing what they can to make sure Meghan feels welcomed and loved'.
Despite this being her first Trooping the Colour ceremony, Meghan looked anything but out of place, as she relaxed and shared a joke with her new husband. She then replied, "Yeah, are you", before adding that she was "nervous".
In her first engagement after marrying Prince Harry, the Duchess of Sussex abandoned her usual fashion-forward outfits for a more prim and proper look. They shared a carriage from Buckingham Palace to Horse Guards Parade where they witnessed almost 1,500 troops perform a military display as part of the official Queen's birthday celebrations. Markle's sister-in-law, Kate Middleton, has always worn a dress with sleeves that go past her elbows, and her husband's late mother, Princess Diana, always wore a long-sleeved gown.
This is the couple's first official royal tour to be announced since getting married in May.
Who does Meghan Markle have to curtsy to?
Kate, Duchess of Cambridge, looked wonderful just weeks after giving birth to her third child, Prince Louis, in April.
All of the Royal Family was in attendance.
She also received some help from Samantha Cohen, an Australian-born palace adviser who has worked closely with the Queen.
Either way, a lot of people leapt to Meghan's defence after the outcry, arguing that some people were focusing too much on archaic rules, and not enough on the fact that the Duchess looked unbelievable.
It's official! The new royal couple exchanged their vows at a royal ceremony at Windsor Castle, near London, in England.