The late Princess Diana would be celebrating her 64th birthday today - and there is no doubt that her loss is still keenly felt by those who loved her.

Diana was only 36 when she was tragically killed on 31 August 1997, leaving behind her two sons, Prince William, then 15, and Prince Harry, 12. There has been much she has missed out on - including the chance to be a grandmother to five grandchildren.

The Princess celebrated her birthday just two months before her death in Paris, and received more than 90 bouquets of flowers and countless cards - a testament to how loved she was.

Princess Diana receiving cards and balloons as she stepped out on her 36th birthday

Arguably her most precious birthday gift came from her youngest son, Prince Harry, who was away at school on the day. Despite not being able to spend the day with his doting mum, he rang her up, making all of his classmates sing Happy Birthday down the phone to her.

As well as her private celebrations, Diana attended a very glitzy public do - the Tate Gallery's 100th-anniversary celebration in London. She stunned in a black beaded dress which Moroccan designer Jacques Azagury gave her as a birthday present earlier that day - the gown went on to become one of her most iconic looks.

Speaking to Hello! , Jacques said: "Diana loved it. I believe she had another dress to wear but ended up wearing mine." The 'people's princess' teamed it with a glistening emerald and diamond choker from the Royal Family's collection.

The late royal was guest of honour at a gala evening at the Tate Gallery

It was originally gifted to Queen Mary by the Ladies of India in 1911, and the Queen gave it to Diana on a lifetime loan shortly after her wedding to Charles. The event, which was sponsored by Chanel, was a very glamorous affair with an impressive guest list. Diana was the guest of honour and was accompanied by her brother Charles Spencer. Tragically, it was the last time he saw her.

Speaking at her funeral just a few weeks later, Charles said: "The last time I saw Diana was on July 1, her birthday in London, when typically she was not taking time to celebrate her special day with friends but was guest of honour at a special charity fundraising evening.

"She sparkled, of course." In the months leading up to her birthday, Diana was focused on her humanitarian work, working tirelessly on charity projects including assisting Mother Teresa in New York and visiting Lahore to raise money for a cancer charity.

Jacques said: "She was happier than I had ever seen her. There was something about the way she carried herself; a certain new-found confidence". Prince William has spoken in the past about how he keeps his mother's memory alive with his own children, George, Charlotte, and Louis.

In addition to displaying pictures of his late mother at home, William has said he talks about her "constantly" with his kids. "[I] just try and remind them that there are two grandmothers, there were two grandmothers in their lives, and so it’s important that they know who she was and that she existed,” he previously said on the documentary Diana Our Mother: Her Life and Legacy.

He went on to joke: "She'd be a nightmare grandmother, absolute nightmare. She'd love the children to bits, but she'd be an absolute nightmare. She'd come and go and she'd come in probably at bath time, cause an amazing amount of scene, bubbles everywhere, bathwater all over the place and—and then leave."

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