The documentary follows Prince William, Princess Anne and the Duke and Duchess of Sussex during royal engagements, and includes Meghan discussing her stunning wedding dress and veil since they have been put on display to be released to the public in October. In the Queen of the World documentary, Meghan expresses her excitement about the trip.
"The Queen is the most well-travelled monarch in history and it's been fascinating to see how she has passed on her experience to the younger generations of the royal family". "Fifty-three countries as well, my goodness, it will keep us busy".
"It's fabric from the dress that I wore on our first date", she added.
Meghan didn't tell Prince Harry, 34, about the awesome idea she had planned for the veil until he saw her wearing it as she walked down the aisle.
In a sneak peak of "Queen of the World", Meghan is seen reunited with her bridal outfit for the first time since she Wednesday Prince Harry ahead of it being displayed in an exhibition in October.
On the day of the royal wedding, our jaws collectively dropped when Markle entered Windsor Castle donning an astonishingly lovely Givenchy dress, a lengthy veil, and Queen Mary's bandeau tiara that Queen Elizabeth II loaned her for the occasion.
She also speaks about the inclusion in her veil of wild flowers from the Commonwealth.
"I'm really over the moon to find out that I would make this choice for our day together", the Duchess said. "I hope that people liked it as much as I liked helping to create it".
Queen of the World is on ITV at 9.15pm on Tuesday.
The show will include details of Queen Elizabeth's work with the Commonwealth countries throughout her years as monarch. Later in the documentary, we get to see the former Suits star seeing her gorgeous Givenchy gown for the first time since her May 19 nuptials.
Markle isn't alone in adhering to this strong British wedding tradition - Sarah Burton of Alexander McQueen confirmed she slipped a blue ribbon into the side seam of Kate Middleton's gown back in 2011.