The Duchess, who married the monarch's grandson in a glittering ceremony at Windsor Castle last month, travelled with the Queen by the royal train to north-west England for a day of events. Meghan nodded and thanked her for the gift.
"That's correct", she replied, "I'm very happy to be here".
At one point, Markle appeared confused over who should enter the royal vehicle first, but resorted to asking the Queen what her preference would be.
'They were very relaxed. They looked like naughty teenagers giggling together at one point.
But another body language expert told the Daily Mail that Markle, who has years of professional training and experience in stage and on-camera performance, also appeared to be nervous during the outing.
"We saw the Queen briefly and she looked a bit puzzled".
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At the event, the new Duchess of Cambridge said, "It's a magnificent bridge".
"There were moments when the two women laughed together and Meghan often leaned in towards the Queen, suggesting growing bonds of rapport and friendship".
'There is formality to the occasion as they step from the train, but the overall tone is relaxed and warm. "The couple shared so much during the wedding and now is the time for them to enjoy some privacy". The impression of spontaneity and warmth'.
The Queen has been on the throne for 66 years and has conducted tens of thousands of public engagements, shaking hundreds of thousands of hands along the way.
"Thanks to a series of tiny loopholes in Canadian law, it's technically possible that Canada could immediately crown Prince Harry and Meghan Markle as king and queen of Canada", according to the country's National Post newspaper.
The former Suits actress looked stunning in a cream-colored, Givenchy dress with black belt, which fit her to perfection.