Camilla, Duchess of Cornwall
The new monarch, who will go by King Charles III, also named Prince William and Kate Middleton as the new Prince and Princess of Wales.
One of the Duchess of Cornwall's dogs, named Beth, posed alongside her for one of the new photos.
The Duchess of Cambridge put her photography skills to the test for a new cover photo for Country Life magazine.
The 95-year-old monarch in March made her first public appearance in over five months.
Camilla invited Emerald Fennell, who portrayed her on the Netflix show, to an International Women's Day event on Tuesday.
The duchess tested positive four days after Prince Charles was confirmed to be infected.
Queen Elizabeth previously announced that the duchess would be known as queen consort when Prince Charles takes the throne.
"We are deeply conscious of the honour represented by my mother’s wish," the Prince of Wales said in a statement.
The Queen offered her blessing for her son Charles' wife to one day be known as "Queen Consort."
Camilla urged those at a reception to renew "our commitment to do everything we can to end violence against women."