By her side was Prince Harry, looking sharp in a navy suit and silver tie.
Erdem was tipped to design Meghan's wedding dress, but in the end the duchess wore a pure white boat neck wedding gown by Clare Waight Keller for Givenchy.
The Duchess of Sussex's personal secretary, Samantha Cohen, also made the decision to leave the royal household in December a year ago, The Times previously reported.
She visited Mulroney in Toronto in August for a three-day getaway.
Her attentive husband Harry held out his hand to guide his pregnant wife as she arrived at the engagement.
Kate Middleton and Meghan Markle shared a warm embrace while attending an interfaith service at Westminster Abbey, which kicks off Commonwealth Day 2019, a celebration of the 53 countries of the British Commonwealth.
These 'Captain Marvel' Actors Were in Previous Marvel Movies!
Centering on Maria and Carol as they form new alliances, that aren't just quickly set up to propel action pieces, is fantastic. When the tables turned, the Oscar-winning actress asks the "Pulp Fiction" star if he honestly likes her Captain Marvel suit.
The custom-made wool outfit also included a nod to Markle's mother, Doria Ragland.
In an interesting case, an ordinary woman from Texas has now gone viral on social media after spending almost £19,000 (Rs 17.2 lakhs) on cosmetic surgery to look like Meghan Markle.
They also helped in "the Canadian spring tradition" of making maple taffy by pouring hot syrup on trays of snow.
The royal couple had a fantastic morning, speaking to young Canadians who were inspiring in the worlds of fashion, arts, business and academia.