Princess Diana usually looked awkward whenever she was around Prince Charles.

But during one rare occasion, the Princess of Wales couldn’t control her laughter while sitting in the car beside her then-husband.

In the unearthed snap, Princess Diana is wearing a black tube dress, which she paired with her diamond necklace and diamond drop earrings. Her face is fully made up, and her hair is also well kept.

Princess Diana looks as though she was laughing at something that she just heard or saw, and she doesn’t want Prince Charles to notice. The mom of two’s lips are sealed and she has a mischievous look in her eyes.

Sitting beside the late royal is Prince Charles who is wearing a suit and black bowtie. The heir to the throne has a serious look on his face, and he is also fixing his tie.

One royal fan came up with a hilarious caption for Princess Diana and Prince Charles’ photo. He wrote, “Let’s end this my friend, I can’t keep this up, Charles.”

Princess Diana and Prince Charles had a difficult marriage. Royal experts claimed that the two didn’t really love each other but were simply forced to tie the knot. Prince Charles really wanted to be with Camilla Parker Bowles, but Princess Diana seemed like a better option because she was a virgin.

In the book “Prince Charles,” royal author Sally Bedell Smith said that the Prince of Wales was unable to wed the love of his life because Camilla’s father forced the Duchess of Cornwall to marry Andrew Parker Bowles instead.

“They intervened by publishing an engagement notice in The Times on March 15. His hand publicly forced, Andrew proposed to his girlfriend of nearly seven years,” Smith said.

Prince Charles was unable to do anything when he found out that Camilla and Andrew were planning on tying the knot. After he returned to London, he made sure to find a suitable wife.

Princess Diana and Prince Charles
Princess Diana and Prince Charles at the Chelsea Flower Show, London, May 1984. She is wearing a navy maternity coat by Jan van Velden. Getty Images/Jayne Fincher