Prince Philip once wrote a touching letter to the Queen Mother after he wed her eldest daughter, Queen Elizabeth II.

In the book “My Husband and I: The Inside Story of 70 Years of the Royal Marriage,” author Ingrid Seward said that the Duke of Edinburgh’s loving note became the blueprint of his life and marriage with Her Majesty.

“‘Lilibet is the only thing in this world which is absolutely real to me and my ambition is to wield the two of us into a new combined existence,’ wrote the 26-year-old Prince Philip to his mother-in-law two weeks after his marriage on 20 November 1947,” Seward revealed.

The Queen and Prince Philip have been married for over seven decades. And even though things seemed peaceful between them in the beginning, the two royals reportedly also had some bitter clashes.

Royal expert Christopher Wilson told Daily Mail that the Queen Mother didn’t like Germans and Prince Philip is one. But other than this, Prince Philip also had different opinions about some of the things that the Royals have been doing for years.

For instance, the dad of four questioned why the members of the royal family have to ask footman to send their messages to each other when they can just talk to each other in person. He felt that not asking the footmen to do this kind of task could also lessen the expenses of the royals.

Prince Philip wasn’t also pleased with the fact that the Queen Mother still saw herself as the Queen even after her daughter was crowned. She wasn’t pleased when she was asked to move to Clarence House because it’s not as big as the Buckingham Palace.

Sarah Bradford said that it was upsetting for the Queen Mother to see the power going to her daughter. And it was Prince Philip who bore the brunt of her disappointment.

During the Queen’s coronation, the Queen Mother and Prince Philip even disagreed on who should take the official photographs.

Prince Philip, Queen Mother, Princess Diana, Queen Elizabeth, Prince Charles, Prince William
Pictured: Prince Philip, Prince Charles, Queen Mother, Princess Diana with Prince William and Queen Elizabeth II at Buckingham Palace. Getty Images/PA