Mulroney, also a bridal consultant, is assisting Markle in planning her May 19 wedding on the grounds of Windsor Castle. She's helping with the design and concept of the wedding party outfits and the look for the reception.

Mulroney flew to London in January to attend Markle's first fitting with her wedding dress designer at Kensington Palace.

\"PHOTO:
George Pimentel/Getty Images
PHOTO: Jessica Mulroney and actress Meghan Markle attend the World Vision event held at Lumas Gallery, March 22, 2016, in Toronto.
>

She traveled to London, again, in March to attend Markle’s baptism, as well as the dinner afterwards hosted by Harry's father, Prince Charles, and stepmother, Camilla, the Duchess of Cornwall.

\"Harry and Meghan will actually take a trip down to Windsor Estates, where they’ll check in on the final plans at Frogmore House, where the evening reception will be,\" said ABC News royal contributor Scobie. \"And Jessica will also get to meet with the cake designer, the florist.\"

What to know about Jessica Mulroney

Mulroney is Canada’s best-known style adviser who represents not only Markle but also assists Canada's first lady Sophie Gregoire Trudeau and many members of Canada’s elite.

She is the wife of Ben Mulroney, whose father is a former prime minister of Canada. The parents of three are a well-known power couple often considered Canadian royalty in Toronto.

\"PHOTO:
Andrew Chin/Getty Images
PHOTO: Ben Mulroney and Jessica Mulroney arrive for the David Foster Foundation Gala at Rogers Arena on Oct. 21, 2017 in Vancouver, Canada.
>

The Mulroneys' daughter, Ivy, is expected to join Harry's niece, Princess Charlotte, as a bridesmaid at Markle and Harry's wedding.

@jessicamulroney & her daughter Ivy are picture perfect in @MaisonBirks' #BeeFriends campaign. #BloorAndBetter #BehindTheScenes #MommyAndMe pic.twitter.com/ONyzlHOGIx

— ManulifeCentre (@ManulifeCentre) August 21, 2017

It is also expected that Mulroney will play a big role on the wedding day of Harry and Markle, who have not yet announced their wedding party.

\"Jessica will be back in London before the wedding and she’ll actually be spending a few days with Meghan at Kensington Palace, where I’m told it will be very much a girlie slumber party,\" said Scobie.

Markle lived in Toronto during her seven-season run on the TV drama \"Suits,\" which films in the Canadian city. Jessica Mulroney helped Markle with her look on \"Suits,\" most notably the wedding dress Markle wore as her character Rachel Zane.

\"PHOTO:
George Pimentel/Getty Images
PHOTO: Meghan Markle and Jessica Mulroney attend the Equinox Yorkville Dinner held at Kasa Moto on Nov. 23, 2015 in Toronto.
>

Markle's much-emulated style and the so-called \"Meghan effect,\" where anything she wears quickly crashes websites and sells out, is largely because of the collaboration and vision between Jessica Mulroney and Markle.

\"Meghan and Jessica have been close friends for years. Thick as thieves,” said Scobie. “They really have kind of gone through the Toronto social scene together.”

Jessica Mulroney has been seen at Markle's side for everything from yoga outings to her most important public appearances. She was invited into the private box at the closing ceremony of last year's Invictus Games alongside Markle and Harry as well as Markle's mom and her other confidante, Markus Anderson.

\"PHOTO:
George Pimentel/Getty Images
PHOTO: Jessica Mulroney poses in the 2017 Canadian Arts And Fashion Awards Portrait Studio at the Fairmont Royal York Hotel on April 7, 2017 in Toronto.
>

In addition to her role as stylist to the stars in Canada, Jessica Mulroney is also a consultant for Kleinfeld Bridal in Canada and a contributing editor for Wedding Vacations.

Ever wonder what our Kleinfeld Hudson's Bay experience is like? @jessicamulroney takes us on a tour of the salon. Video by @MPSGweddings pic.twitter.com/5qHFmvLLiX

— Kleinfeld Canada (@KleinfeldCanada) May 17, 2017

Dream dress and a gorgeous bride to be. ??

A post shared by @ jessicamulroneyweddings on Mar 18, 2018 at 9:57am PDT

Like Markle, she uses her platform to help with charitable causes, founding the Shoebox Project, a charity that supports women who are homeless and living in shelters.

.@jessicamulroney on how you can give back this #ValentinesDay @shoeboxcanada @Canucks https://t.co/4zr7U8ZOMB

— CTV Morning Live (@CTVMorningLive) February 14, 2018
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