Trooping the Colour is one of the most exciting events in the royal calendar and is always held on the second Saturday of June to officially celebrate the sovereign's birthday.
For her first Trooping the Colour ceremony, Meghan chose a peach off-shoulder Carolina Herrera dress, paired with a massive, shallow Philip Treacy hat.
The younger royals lined up in front of the adults to enjoy the fly-past of modern and historic aircraft, with Prince George and Princess Charlotte standing with their parents, the Duke and Duchess of Cambridge.
Meghan gave a polished and poised wave to thrilled crowds as she made her way through London with Prince Harry in an open-top carriage.
The former Suits star joined The Queen for the first time on the Buckingham Palace balcony today with the rest of the family. But first, she will attend a solo outing with Queen Elizabeth II to Chester on Thursday, June 14.
"Meghan looked very much regally appropriate for such an important royal event", Amanda Dishaw of Meghan's Mirror told E! She wasn't on display during the ceremony, but instead got to watch it from a window in the Horse Guards building while talking with other royals.
They will make a series of public appearances, opening a bridge and a theatre before having a formal lunch.
The lip-reader, who studied the newly married couple during the balcony appearance, decoded the words they shared, revealing that Meghan confessed she was apprehensive about the appearance.
Meghan also had her hair styled in a bouncy blowout.