Royal expert Richard Fitzwilliams told Express.co.uk: "Meghan is indeed planning to take her activism around the Commonwealth with Harry as part of the Royal Foundation after the wedding". 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.
Meghan Markle's unmistakeable style has garnered her fans all over the world, who regularly attempt to recreate her flawless looks. One Twitter user commented saying, "Can Meghan Markle for once just follow protocol and not show her shoulders or push the limits?!"
The colour was first trooped through the ranks of soldiers before the Guardsmen marched past the Queen, first in slow then in quick time.More news: Dustin Johnson holes out from fairway on 18th hole
Many people on Twitter are speculating that Prince Harry cued Meghan when it was time. She matched the dress with a hat by royal family favourite milliner, Philip Treacy.
The Queen, whose actual birthday is on April 21, inspected the troops and received a royal salute, and watched displays of precision marching before she was due to make her way back to Buckingham Palace.
This is the couple's first official royal tour to be announced since getting married in May.
Grant guesses that Meghan will learn most of the royal etiquette through her husband Prince Harry, who sweetly explained ins-and-outs of the day to his wife at Meghan's first Trooping the Colour this weekend.
The two young Royals grinned in excitement as they watched a series of fighter jets and planes fly overhead.