Princess Diana
Princess Diana used bags to cover her cleavage from paparazzi. Pictured: Prince Charles and Princess Diana at Westminster Abbey, London, for a centenary service for the Royal College Of Music on Feb. 28, 1982. Getty Images/Fox Photos

Princess Diana came up with a trick to cover her cleavage from the paparazzi.

A friend of Princess Diana revealed her secret to keeping paparazzi from snapping her cleavage. According to Anya Hindmarch, Prince William and Prince Harry's mom has a "cleavage bag." She used a bag to cover her chest whenever she stepped out of a vehicle.

"We used to laugh when we designed what she called her 'cleavage bags,' little satin clutches which she would cover her cleavage with when she stepped out of cars," Hindmarch said (via Express).

The publication also shared several photos of Princess Diana stepping out of cars with a bag on her chest. On Oct. 26, 1995, the royal was photographed leaving a car at the premiere of the film "Haunted" in London with a blue satin clutch in front of her chest. She was also snapped in the same position on July 1, 1997.

Princess Diana came up with the idea after the paparazzi snapped her in a yellow jacket and black dress with her cleavage a little exposed.

In related news, just recently, Princess Diana's former royal butler Paul Burrell said that Meghan Markle would never achieve a certain thing because the People's Princess had already done it. "It’s astonishing that one woman could change the course of the Royal family," Burrell said on Yahoo documentary "The Royal Box."

"Meghan can never do that, it's been done," Burrell continued. "It was done by her mother-in-law. All Meghan has to do now is to follow Harry and project the Royal family into the future."

Burrell also warned Markle in the same interview to be careful with what she wishes for. According to him, Princess Diana learned it the hard way.

"I think, yes she did want to be famous, she's got everything that she wanted, but I [also] think 'be careful what you wish for' because sometimes it's not all that it seems," Burrell said. "Diana found that out, at an early age. To be a royal princess sometimes, losing your anonymity, losing that freedom, that's a big ask for any woman in today's society."