"A wedding/formal event is not a time and place to express yourself," said one user.
Kardashian bought the iconic jewel worn by Princess Diana for $197,452 at auction on Wednesday, after wearing Marilyn Monroe's dress to the 2022 Met Gala.
"This is 100 percent the start of a very bad story. You will regret the ending," one Reddit user wrote, while another posted: "BIG RED FLAG!"
Both Kate and Meghan are fans of the Canadian-born, British-based designer Erdem Moralioglu and his floral-inspired creations.
The actress wore an iconic gown designed by Gianni Versace but was slammed for adding a surprising detail.
"I decided I would leave and take back the cheque. That's when they stopped laughing," the wedding guest said on Reddit.
Princess Diana showed the world from a young age her ability to set trends, becoming one of fashion history's most enduring style icons.
"Sorry the bride is telling guests what to wear?? Is this really a thing?" asked one commenter on the viral post.
He told the friend, who previously attended their prom in a dress, to "man up" and "act his age" at their wedding
The Princess of Wales surprised fans by wearing her first rented evening dress for the Earthshot Prize awards.
On her whirlwind three-day visit to Boston, Britain's new Princess of Wales made a series of bold fashion statements from powerful pantsuits to rented gowns.
The Princess of Wales hit the ground running for her royal visit to Boston this week with three outfit changes in the space of the first day.
As Kate and William head to Boston, Newsweek looks at the royals' best U.S. fashion moments; from Diana and Meghan in New York to Kate in California.
The royal attended the 1996 Met Gala in New York four months after her divorce from Prince Charles, wearing one of the most daring dresses of her public life.
The granddaughter of President Joe Biden and first lady Dr. Jill Biden will be marrying her fiancé, Peter Neal, on the White House lawn later this month.
"I found my dress torn to shreds, I immediately called Jackson and started screaming at him," said the poster on Reddit. Her late brother had made the gown.
The reality star said she "screamed" at her mom after Ripley's Believe It or Not "flat-out" refused to give her the gown.
The bride said has struggled to get over it and it's all she sees "every time I look at our wedding photos."
"The charity should have priced it at £100 ($115.94) if they wanted £100 for it," one Mumsnet user wrote in support of the poster.
"That is literally the cutest thing I've ever seen," said one viewer of the viral TikTok video.
Elizabeth Debicki who plays Diana in season five of "The Crown" said that the princess's famous black cocktail dress "provoked something in me as an actor."
Royal fashion expert Miranda Holder said that "every tiny style statement is understood by the palace to communicate to the world an important message"
Wedding planner Mark Niemierko told Newsweek that guests wearing white is a "big no-no," but there are exceptions like Pippa Middleton at her sister's wedding.
"Is this normal? I think it's horrifying and toxic!" her friend raged.
"We see this over and over again. It's not the dress. It's not the makeup. It's the fact that you looked great in it," one user commented.
The Duchess of Sussex wore a pale pink hue that was favored by the late queen, which Meghan also wore on her wedding day in 2018.
"I hope that parents learn that advocating for their children is so important," Piper Gartner Phillips told Newsweek.
Queen Elizabeth II, for over 70 years, presented and conserved the image of a monarch in the modern day. Through fashion she transformed from princess to queen.
Meghan Markle and Prince Harry were told to "shut up" by a TV presenter who fought their corner in the days after the Oprah Winfrey interview.
"There's a reason this family didn't want to clean it out themselves," one person wrote. "You took it on and now you get to enjoy the treasures you found."