Lily Allen, Alfie Allen
Lily Allen and Alfie Allen met the Princess of Wales in London in 1991. Pictured: Lily Allen, Alfie Allen at the World Premiere of his latest film Flashbacks of a Fool in Leicester Square, London on April 13, 2008. Getty Images/Max Nash/AFP

Lily Allen recently revealed her brother Alfie’s embarrassing confession to Princess Diana years ago.

In her book, “My Thoughts Exactly,” Allen said that she and Alfie met Princess Diana in 1991 at the London premiere of “Hear My Heart.”

“Diana, the Princess of Wales came to the premiere. I was a flower girl and gave her a posy. Alfie had a box of handkerchiefs to give her but somehow he got his [expletive] caught in his trouser zip moments before meeting her,” she said (via People).

Princess Diana saw a young Alfie crying and was concerned for the little boy.

“‘Are you ok?’ she asked him. ‘No,’ he replied. ‘I’ve got my willy caught in my zip,’” Allen wrote.

Princess Diana’s maternal instincts might have kicked in that time because she herself is a mom to two boys – Prince William and Prince Harry. In the documentary “Diana, Our Mother: Her Life and Legacy,” the Duke of Sussex gushed over the Princess of Wales.

“Our mother was a total kid, through and through. When everybody says to me, ‘So she was fun, give us an example,’ all I can hear is her laugh in my head. That sort of crazy laugh of where there was just pure happiness shown on her face,” he said.

Princess Diana passed away following a fatal car crash in Paris in 1997. Years after her death, Prince William and Prince Harry somewhat blamed the paparazzi for their mom’s sudden demise.

In last year’s documentary, Prince Harry said (via CBS Local), “I think one of the hardest things to come to terms with is the fact that the people that chased her into the tunnel were the same people that were taking photographs of her while she was dying on the back seat of the car. She had quite a severe head injury but she was very much still alive on the back seat. And those people that caused the accident, instead of helping, they were taking photographs on the back seat, and then those photographs made their way back to news desks.”