Princess Diana once enjoyed a night out in a gay bar with a famous pal.

The late Princess of Wales supported the gay community and even visited patients dying of AIDS. However, her fondness for them was extended to the gay nightlife.

In the book "The Power of Positive Drinking" by British TV star and model Cleo Rocos, he recalled a gay bar visit with Freddie Mercury, Kenny Everett and Princess Diana. They were initially afraid that the royal would get caught, but the People's Princess insisted that they do it.

"When we walked in . . . we felt she was obviously Princess Diana and would be discovered at any minute. But people just seemed to blank her. She sort of disappeared. But she loved it," Rocos recalled.

According to him, Princess Diana was very delighted when was served in the bar and wasn't recognized. Their gay bar trip happened after a boozy afternoon. The four were drinking champagne and improvised the characters' voices of "The Golden Girls." The royal asked the trio for their plans that evening and they revealed that would go to Royal Vauxhall Tavern in South London.

"Kenny said, ‘It’s not for you. It’s full of hairy gay men. Sometimes there are fights outside," Rocos said.

"We pleaded, ‘What would be the headline if you were caught in a gay bar brawl?'" he added. "But Diana was in full mischief mode. Freddie said, 'Go on, let the girl have some fun.'"

Princess Diana put on what Everett planned to wear that evening. They had a great time. After the said night out, the royal had Everett's clothes couriered back with a note that read: "We must do it again!"

Princess Diana was known for her naughty and hilarious antics. In fact, she sent a provocative birthday card to her accountant.

The letter features Sleeping Beauty with the words "A little prick in the hand sent Sleeping Beauty to sleep." Upon opening the card, the message read: "Only the big ones are worth staying awake for!...."

The owner of the card was shocked with it and was convinced that the People's Princess was a "fun human being" who could share dirty jokes with her close friends. He found the card "flirty and naughty judging by the text" on it and concluded that Princess Diana "wasn't that innocent at all."