Meghan's former agent, Gina Nelthorpe-Cowne, described her before the wedding as unique in her determination to succeed.
Meghan eventually ended up wearing a diamond and platinum tiara from the Queen's collection.
She was the Duchess of Sussex's closest aide in the palace.
The spat led to "a very heated exchange" causing the Queen to later have a talk with the Duke of Sussex.More news: Chandimal looks to tackle England with spin in Herath’s farewell Test
Bride-to-be Markle wished to wear a tiara with emeralds but was refused after its origins could not be established.
Markle opted for a more subtle-looking poppy pin, while her family members donned the bright red brooch.
There's reportedly some drama in Kensington Palace this week, and no, it's not still about the Queen's tiaras.
It's reported that The Queen also questioned Meghan's desire for a veil at the Royal wedding, considering it's her second marriage and etiquette experts often maintain the opinion that it goes against the veil's original symbolism of virginity.
Meghan apparently did not understand the staff of the Royal family had to be treated with a certain amount of respect and gratitude.More news: Twitter is Freaking Out Over Le'Veon Bell's Cryptic Madden Reference
News of the departure comes as more details emerged about the run up to the wedding in Royal biographer Robert Jobson's new book Charles at 70.
Meanwhile, Kate Middleton rocked a sheath dress, which was also black and with half sleeves. "As I am sure you can imagine, this has been a particularly busy time for this office and we have, consequently, been unable to reply as quickly as we should have liked to".
'Melissa is a hugely talented person, ' the source says.
Why would she want to leave such a prestigious job so soon?'
Despite the rules, the expecting mom is "determined to do things her way", said the source.More news: Camp Fire Closes Schools In Butte County On Friday