Royal author Tom Bower previously claimed that Meghan’s assistant Melissa Toubati and dress-fitter Clare Waight Keller both claimed to have “witnessed Meghan emphatically reject Kate’s observation”.
Presenter Kirstie Allsopp, who is a friend of Queen Camilla, also claimed that the altercation led to tears from the Princess of Wales.
Writing in his biography Revenge, Mr Bowers said: “Meghan alighted on a tiara sparkling with emeralds. Her choice was approved by Harry. [Angela] Kelly suggested that its Russian origin made it unsuitable.”
He added about the late Queen Elizabeth’s personal advisor that Harry was also reportedly angry with Angela.
The couple – who are now parents to Archie, 6, and three-year-old Lilibet – only became engaged in November 2017 – just six months before their wedding day.
The pair’s big day was filled with pomp and pageantry, featuring grand florals, a lavish reception and a host of high-profile guests. The overall bill for the wedding is thought to have cost up to £32 million – with around £30 million going on security costs alone.
Harry and Meghan celebrated their seventh wedding anniversary last month.
