Jessica is one of Meghan's closest and most trusted friends.
The pair have known each other since Meghan moved from Los Angeles to Toronto, and have travelled to Italy together.
Jessica's children were even in the bridal party for Meghan and Harry's wedding.
However, this week the stylist posted a picture of another bride wearing an almost carbon copy of Meghan's dress on Instagram.
“This look. This couple! “High neck for the win," she wrote in the caption.
The entire look was almost identical to Meghan's, with the same high neck design and fit.
The bride even styled her hair the exact same way, clearly inspired by the Duchess of Sussex's wedding look.
Mulroney's followers instantly noticed the resemblance, leaving a series of comments.
“It’s a Meghan Markle reception dress for a bride!" wrote one user.
Others agreed, with one follower writing, “It reminds me of Meghan’s second gown."
“Looks like Meghan’s evening dress," said another.
While Mulroney tagged Kleinfeld Canada as the designer, it didn't do much to deter royal fans from drawing comparisons.