Camilla's new title appears on the invitations for the coronation celebration on May 6, which were sent to more than 2,000 guests.
"Queen Camilla is the appropriate title to set against King Charles on the invitation. The coronation is an appropriate time to start using Queen Camilla in an official capacity," a source told The Sun.
Sources add it "made sense" to use the title Queen Consort while referring to Camilla in the last seven months in order to distinguish her from the late Queen Elizabeth.
When Charles and Camilla were married in 2005, it was revealed she would be referred to as Princess Consort when he became King. However, the late Queen made it clear last year that it was her "sincere wish" that Camilla be known as Queen Consort instead.
In her Platinum Jubilee message, the Queen said: "When, in the fullness of time, my son Charles becomes King, I know you will give him and his wife Camilla the same support that you have given me; and it is my sincere wish that, when that time comes, Camilla will be known as Queen Consort as she continues her own loyal service."
Camilla will be coronated with Charles and will be known as Queen Camilla from then on.
A new portrait of Charles and Camilla was unveiled today featuring the couple posing in blue outfits arm-in-arm, with royal fans labelling the photo as "stunning".
Prince George's role confirmed
It has been rumoured for some time what role second-in-line to the throne Prince George will play in the coronation, with Prince William and Princess Kate reportedly nervous to put him under too much scrutiny on the day.
The nine-year-old will make history as the youngest heir ever to have an official role in a coronation as one of eight Pages of Honour, who will accompany King Charles at the ceremony and join the procession into Westminster Abbey.
According to People magazine, a royal source revealed William and Kate are "cognizant that he is old enough to understand what's going on", but mindful that normal life will resume when George is back at school and the coronation is the talk of his classmates.
"His parents are very excited and delighted that he is a page," a spokesperson for the Prince and Princess of Wales tells the publication. "It's something that his parents have thought long and hard about and are very much looking forward to — and I'm sure George is, too."
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