Prince Philip used to have a very endearing secret nickname for Queen Elizabeth II, which he would usually utter when they are at informal settings.

In the movie “The Queen,” Peter Morgan, the creator of the hit TV show “The Crown,” said that the Duke of Edinburgh used to call Her Majesty “my darling.”

“I inquired in royal circles and was told on very good authority that it is what the Duke sometimes calls the Queen,” he said.

Last year, royal biographer Robert Lacey confirmed Morgan’s claim by saying that he also heard the same thing. Lacey said that Prince Philip used to call the Queen “cabbage,” which is an abbreviation of the French term “mon petit chou.”

Meanwhile, the Queen and Prince Philip also made headlines this week after it was revealed that the royal couple became increasingly concerned for Prince Charles after some events in the 1950s disturbed them.

In the book “Behind the Throne: The Domestic History of the Royal Household,” it was revealed that the Queen complained about the intrusive press coverage to the Press Council.

Author Adrian Tinniswood wrote, “She and her husband were ‘disturbed’ – a favorite Colville [the Queen and King George VI’s press secretary] expression – by the publicity surrounding the 9-year-old Prince Charles’ participation in school sports.”

In the book, it was also revealed that the monarch told the Press Council that the constant press interest towards her eldest son resulted in her no longer attending Prince Philip’s polo matches in Windsor.

In related news, the Queen’s former press secretary, Sir Richard Colville played a crucial role in Her Majesty and Prince Philip’s relationship. Decades ago, rumors swirled that the Duke of Edinburgh was being unfaithful towards his wife.

It was Colville who denied the speculations. “It’s quite untrue that there’s a rift between the Queen and the Duke of Edinburgh. It’s a lie,” he said.

The Queen and Prince Philip tied the knot in 1947.

Queen Elizabeth II, Prince Philip
Pictured: The Queen, Prince Philip arrive ahead of the wedding of Princess Eugenie of York and Mr. Jack Brooksbank at St. George's Chapel on October 12, 2018 in Windsor, England. Getty Images/Jonathan Brady/WPA Pool