Meghan Markle, 37, and Prince Harry, 34, married in May.
According to recent reports Meghan was refused her first choice of tiara by the Queen, causing a "very heated exchange".
Meghan said: "What are you talking about?"
Meghan wore the Queen Mary Lozenge's tiara in the end, but did she want to wear the Vladimir Tiara?
The tiara is known at the Vladimir tiara, and was given to Marie of Mecklenburg-Schwerin when she married Grand Duke of Vladimir Alexandrovich of Russia in 1897.
It came to the UK in 1917 when Grand Duchess Maria Pavlovna was advised to flee Russia after the revolution.
The tiara was smuggled out of Russia in a pair of Gladstone bags.
Grand Duchess Maria Pavlovna's daughter Grand Duchess Elena in 1921 by Queen Mary.
She had royal jewels Garrad repair the gems and three years later had a set of fifteen emeralds attached to the stunning piece.
The Queen has been wearing the piece with these attachments, with pearl attachments and no attachments.
However, most recently she was with the emeralds to honor the Irish president during a state banquet in 2014.
Robert Jobson tells the story of the disagreement over the tiara.
A royal insider told the writer: "Meghan had her heart set on this tiara with emeralds and prince Harry hit the roof when she was told it was impossible to wear it.
"The provenance of the tiara could not be established. There were concerns it could have come from Russia originally.
"There's a very heated exchange that prompted the Queen to speak to Harry. She said, 'Meghan can not have whatever she wants. She gets what tiara she's given by me '. "
Princess Eugenie wore the Greville Emerald tiara for her wedding.
The piece is Margaret Greville's Kokoshnik Emerald Tiara. It was made by Boucheron in 1921 and the whopping center emerald is 93.70 carats.
The tiara originally belonged to Dame Margaret Greville and what left to Queen Elizabeth II in 1942.
Who is Meghan Markle? Quick profile
Meghan Markle was born Rachel Meghan Markle, on August 4, 1981 to parents Doria Ragland and father Thomas Markle.
Samantha Markle and brother Thomas Markle Junior.
Meghan's First Television Appearance in the United States in an Episode of the Medical Drama General Hospital in 2002.
Get Him to the Greek, Remember Me and Horrible Bosses.
Meghan what a "briefcase girl" on Deal or No Deal – what Rachel Zane in legal drama suits, which launched in 2011.
She was written in the final of the seventh series when her character got married, which aired in April 2018 – just before she got married herself.
Charity and humanitarian work
Meghan Markle's career in television has gone hand-in-hand with her for causes close to her heart.
She wrote about the stigma around menstrual health in an article for Time Magazine and what a Global Ambassador for World Vision Canada – with whom she traveled to Rwanda for the Charity's Clean Water Campaign.
Commitment to gender equality has received a standing ovation in 2015 for International Women's Day.
In September 2011, she wed filmmaker Trevor Engelson, who she started dating in 2004.
But the pair divorced two years later in August 2013, citing irreconcilable difference.
Cory Vitiello for almost two years before they broke up in 2016 but the two remain good friends.
And in June 2016, she met Prince Harry on a blind date.
Their relationship began in October that year and just over one year later, on November 27, 2017, the pair announces their engagement.
They married on May 19, 2018 at St George's Chapel in Windsor Castle.
Meghan Markle is the first mixed-race member of the Royal Family.
Historians are still arguing about Queen Charlotte, the wife of King George III.
But Meghan wants to be the first royal to openly embrace a mixed-race heritage.
She has been writing about the difficulties of being a biracial actress in Hollywood as she claims she is not enough for some roles and not enough for others.