Armed also with hand warmer heat packets, she will camp there till Saturday to ensure she gets a good view of Prince Harry and Meghan Markle's carriage procession after they have tied the knot in a ceremony at St George's Chapel in the castle.
The palace says there will be six bridesmaids ranging from two to seven years old and four page boys, ranging from four to seven.
"I was hoping to see them waving on the balcony, but I only found out yesterday that there's no balcony!"
"I think they will add a charm to the big day, and one of them will probably end up upstaging the bride - and it might well be Princess Charlotte", she said.
Meghan Markle's half-sister, Samantha Markle reportedly supported her father and blamed herself for all the staged photos.
The Mulroney children often appear on Jessica's Instagram account, where she has 118,000 followers.
Meghan Markle is pictured at Anzac Day dawn service at Hyde Park Corner on April 25, 2018 in London.
Raised in Montreal, Mulroney has also worked as a bridal consultant and fashion expert.
Mulroney first joined Hudson's Bay Co. And as per reports, she had even contributed to Robin Thicke and Paula Patton's wedding back in 2005.
"I think Meghan leans on her quite heavily for advice, both to do with style but planning as well", Nicholl said.
Just a few hours after news that Meghan Markle's father Thomas Markle wants to walk his daughter down the aisle broke out, a TMZ report claims that he will have a heart surgery on Wednesday morning and therefore, can not attend his daughter's wedding on Saturday. "I searched the world for something that I thought was really sentimental", she said.