• Royal fans paid tribute to Princess Diana on Twitter on what would have been her 60th birthday
  • Many recalled the late Princess of Wales' generosity, selflessness and kindness
  • Prince William and Prince Harry remembered their mom for her love, strength and character

Royal fans recently remembered Princess Diana, who would have turned 60 years old this year.

While her sons Prince William and Prince Harry celebrated her milestone birthday this Thursday by unveiling a statue they commissioned in honor of her in Kensington Palace, fans of Princess Diana and Twitter users posted sweet tributes for the late Princess of Wales on the micro-blogging site.

"Good morning today a special lady is to be celebrated on her 60'th Birthday. Princess Diana & I met several times she was great fun had a real sense of humour the statue being unveiled today will help remember her for generations to come. Happy Birthday Princess Diana," former WBC heavyweight champion Frank Bruno tweeted.

"Happy 60th Birthday, Princess Diana," another wrote. "NO ONE will will ever compare to her. She was self-less, generous, caring and truly the people’s princess."

"Happy Heavenly Birthday to a wonderful woman and Mother. Boy, how I miss Princess Diana," actor and writer Chizzy Akudolu wrote.

"princess diana is one of the most important people to me, since the moment I knew about her I felt this magnetic connection with her instantly, happy 60th birthday to the woman the whole world loved and still loves! forever and ever," another user added.

Journalist Libby-Jane Charleston tweeted a photo of the late royal, along with a quote from Princess Diana, which said, "I knew what my job was. It was to go out & meet the people & love them." She added, "Happy 60th birthday Princess Diana, always loved, never forgotten."

Meanwhile, Prince William and Prince Harry also issued a joint statement via the Duke and Duchess of Cambridge's official Twitter account where they paid tribute to their mother.

"Today, on what would have been our Mother’s 60th birthday, we remember her love, strength and character – qualities that made her a force for good around the world, changing countless lives for the better," the brothers wrote.

"Every day, we wish she were still with us, and our hope is that this statue will be seen forever as a symbol of her life and her legacy," they added.

Prince Harry and Prince William went on to thank sculptor Ian Rank-Broadley, garden designer Pip Morrison and their teams for their work on the statue and the Sunken Garden at London's Kensington Palace where it was displayed. The royal siblings also acknowledged the friends and donors who helped make the memorial in honor of their mother possible.

They concluded their message by thanking "all those around the world who keep our mother's memory alive."

Royal fans also flocked to Kensington Palace for the unveiling, bringing with them mementos of Princess Diana, Insider reported. In photos published by the outlet, some dressed in formal attire and showed off collages of the late princess and balloons to celebrate her birthday.

Princess Diana
Diana, Princess of Wales, wears an outfit in the colors of Canada during a state visit to Edmonton, Alberta, with her husband. Bettmann/Getty Images