Princess Diana's Deeply Personal Letter to Terence Stamp Reveals Candid Remark About Antidepressants: 'Three Cheers for Prozac'

Princess Diana's private correspondence is shedding new light on her personal struggles decades after her death.

A newly revealed letter from the late Princess of Wales contains a candid reference to Prozac, offering a rare glimpse into her state of mind during a difficult period in her life.

The handwritten note, dated October 17, 1991, was sent to actor Terence Stamp after the pair shared lunch together, per HOLA!.

Thanking the late actor for making her what she described as the "perfect" risotto, Diana praised his support and understanding before making a surprising comment about antidepressants.

"Not many people would take the time and trouble to delve into such a complex situation... Three cheers for Prozac, not the American variety, I hasten to add!" she wrote. "Lots of love, Terence, and a huge thank you, from Diana x."

The letter is among a collection of Stamp's personal belongings being auctioned by Bonhams and is expected to fetch between $2,000 and $2,600.

Diana brought up Prozac again in another letter sent just one month later.

After thanking Stamp for treating her to lunch and caviar, the royal joked: "No Prozac withdrawals as yet!"

The correspondence offers a rare insight into Diana's private conversations during a period when she was navigating intense public scrutiny and personal challenges.

Diana and Stamp reportedly became friends through art dealer Oliver Hoare and maintained a warm relationship that is reflected throughout the collection of letters.

The letters also reveal Diana's playful side.

In December 1991, she invited Stamp to lunch using a postcard featuring a woman's b----- alongside the message: "All the Breast from London."

She also sent the actor a humorous card asking: "Why did God invent S--?"

Diana penned her own answer inside: "So that married people do something at least twice a year."

Recently, OK! revealed that long before Princess Diana became one of the world's most celebrated style icons, she nearly faced a fashion faux pas during her first visit to Balmoral.

Diana was just 19 when she traveled to the royal family's Scottish estate before marrying then-Prince Charles.

According to former royal butler Paul Burrell, staff were stunned to discover she had packed only one evening dress for the three-night stay.

A source told OK!: "At the time, there was genuine anxiety among some members of staff because Balmoral had a reputation for being one of the most intimidating environments in royal life. Every detail was scrutinized, from what guests wore to how they behaved at dinner. For a teenager entering that world for the first time, arriving with only one evening dress was seen as a potential social disaster."

In his book A Royal Duty, Burrell recalled a housemaid holding up "a simple long black evening dress" and exclaiming: "She's only got the one, and she's here for three nights. What is she going to do?"