Prince Philip’s nickname for wife Queen Elizabeth is actually baffling

Undoubtedly one of the cutest couples on the planet, Prince Philip and Queen Elizabeth have been married for over 70 years.

Through thick and thin, the royal pair have stuck by each other's sides. While the two are notoriously private about their life behind closed doors -- they rarely show displays of affection in public -- one adorable detail about their relationship will melt your heart.

Just like any couple, the Duke of Edinburgh and Her Majesty have cute nicknames for each other. In the 2006 film "The Queen," the actor who plays Prince Philip calls his wife Queen Elizabeth "cabbage." Yes, cabbage. Who knew vegetables could be so endearing?

“I inquired in royal circles and was told on very good authority that that is what the duke sometimes calls the Queen,” said the film’s screenwriter Peter Morgan tells The Times. The queen’s biographer, Robert Lacey, confirmed.

Many believe that his term of endearment comes from mon petit chou, a French way of saying “my darling.” In English, the term translates literally to "my little cabbage."

But that isn't the only nickname Queen Elizabeth has. Her grandson, Prince George, calls her "Gan-Gan" while her family called her "Lilibet" when she was younger to poke fun at the fact that the then-princess couldn't properly pronounce her name.

Which nickname do you think is the cutest?

For more on Queen Elizabeth and Prince Philip's marriage, watch the video above.