Camilla, 77, and Anne have grown close since Her Majesty joined the royal family in 2005 following her wedding to King Charles.

Princess Anne, who is widely known as the hardest working royal, appears to also be a stickler for the rules because, the royal just refused to break protocol even with Queen Camilla 's permission. On Wednesday, Camilla was presented an honorary doctorate of literature by her sister-in-law Princess Anne.

Queen Camilla and Princess Anne took part in a rare joint engagement on Nov. 20, and when Queen Camilla attempted to break royal protocol and let her sister-in-law the Princess Royal walk in before her,

Queen Camilla was presented with a special honor by none other than her sister-in-law, Princess Anne. Camilla, 77, was awarded an honorary doctorate of literature by The University of London on Wednesday0.

In a surprising turn of events, Princess Anne bestowed a new title upon Queen Camilla. This unique gesture was made possible by Anne's special position within the royal family.

Princess Anne and Queen Camilla conducted a joint engagement on Wednesday, where the Queen asked her sister-in-law to break royal protocol - but Anne had a hilarious response

Princess Anne is not going to break royal protocol, not even for Queen Camilla. King Charles III's sister and wife made a joint appearance at the University of London Nov. 20, where Anne, the school's Chancellor,

Queen Camilla was presented with a special honor by none other than her sister-in-law, Princess Anne. Camilla, 77, was awarded an honorary doctorate of literature by The University of London on Wednesday,