Meghan Marklehad the same reaction to herwedding gownas millions of royal fans around the world: total astonishment.

The special moment when the Duchess of Sussex saw her wedding dress and veil was captured on film forQueen of the World, a new documentary series featuring members of the royal family speaking aboutQueen Elizabethand the Commonwealth, the family of nations linked to the U.K.

A huge smile crosses Meghan’s face as she looks at her bridal outfit from top to bottom, then touches herveil, which features hand-embroidered flowers from each of the 53 counties in the Commonwealth. (There were also a few personal touches: She had the Wintersweet, which grows in the grounds of Kensington Palace in front of Nottingham Cottage, and the California Poppy, the State flower of California, added as well.)

“Fifty-three countries, oh my goodness,” she’s heard saying. “It’ll keep us busy.”

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Meghan was on hand to see her dress one last time before it was prepared for a new exhibition for the Royal Collection.

In the clip, Meghan is wearing the Roland Mouret’s Barwick Dress in navy — thesame outfit she worewhile checking into theCliveden House Hotelwith her mom,Doria Ragland, the night before the royal wedding. (Of course, we know Meghan isn’t afraid to pull aroyal rewear, especially with apopular dress that has earned fanssuch asJennifer Garner!)

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A palace source tells PEOPLE that Meghan takes part in “a conversation, a stand-up chat” for the film,Queen of the World, which will air on HBO in the U.S. on October 1.

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The documentary series airs just before Harry and Meghan head to Australia, New Zealand, Fiji and Tonga on theirfirst official tour of Commonwealth nations.

Queen Elizabeth and Meghan Markle in 2018.Mark Cuthbert/UK Press via Getty Images

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source: people.com