It was a special night at St James' Palace on Tuesday (2 June) as the Royal Family hosted a special reception to celebrate the anniversary of a charity very close to their hearts. The King Charles, Queen Camilla and The Princess of Wales invited special guests to mark the milestone, and Kate chose a poignant look which nodded to the occasion.

At the reception to mark 125 of Cancer Research UK, Kate wore a red polka dot dress with puff sleeves by Rodarte, emulating a favourite look of Princess Diana. The late Princess often wore red polka dots, especially with statement shoulders, which were a prevalent trend in the 1980s.

london, england june 2: catherine, princess of wales attends a cancer research uk reception to mark the charitys 125th anniversary at st jamess palace on june 2, 2026 in london, england. (photo by jonathan brady pool/getty images)
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british royal diana, princess of wales (1961 1997), wearing a white and red polka dot catherine walker dress, during a visit to the royal college of art in london, england, 21st july 1989. the princess is accompanied by her personal protection officer, ken wharfe. (photo by tim graham photo library via getty images)
Tim Graham
Princess Diana wearing a red polka dot dress by Catherine Walker in 1989.
princess diana polka dots
getty
Princess Diana often wore red polka dot looks.

There was one hidden detail in Kate's dress however, which was easy to overlook. While the print appears to be dots, the pattern is in fact a smattering of tiny hearts, nodding to the fact that cancer is a cause close to her heart. The Princess of Wales received treatment for cancer in 2024, revealing the good news last year that she was now in remission. Her father-in-law, King Charles, has also been being treated for a form of cancer, but he announced in December that, from the New Year, he was able to reduce his treatment.

london, england june 2: catherine, princess of wales reacts during a cancer research uk reception to mark the charitys 125th anniversary at st jamess palace on june 2, 2026 in london, england. (photo by yui mok pool/getty images)
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The evening at St James' Palace brought together researchers, clinicians, volunteers and celebrities associated with the cause, who are helping prevent, diagnose and treat cancer, as well as raise awareness. Davina McCall was among the attendees, and was pictured speaking with The Princess. Last year, Davina underwent surgery for breast cancer.

london, england june 2: catherine, princess of wales (r) speaks to davina mccall during a cancer research uk reception to mark the charitys 125th anniversary at st jamess palace on june 2, 2026 in london, england. (photo by jonathan brady pool/getty images)
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The Princess of Wales spoke with Davina McCall at the reception.

A joint post on the Royal Family and Prince and Princess of Wales' instagram accounts included a video montage of the evening, showing King Charles, Queen Camilla and The Princess of Wales chatting and mingling with guests at the event. A message alongside the post read; 'Marking 125 years of Cancer Research at St James’s Palace. Honoured to meet researchers, clinicians, volunteers and partners driving progress in the prevention, diagnosis and treatment of cancer.'

london, england june 2: catherine, princess of wales speaks with guests during a cancer research uk reception to mark the charity's 125th anniversary at st james's palace on june 2, 2026 in london, england. (photo by yui mok pool/getty images)
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Inspired by The Princess of Wales classic red polka dot look? We've found some alternatives on the high street, which emulate the same style from favourite brands including Boden, M&S and Ghost:

Finery London Polka Dot Midi Tea Dress

Polka Dot Midi Tea Dress

Finery London Polka Dot Midi Tea Dress

Credit: M&S

Red Polka Dot Collared Norma Midi Dress

Red Polka Dot Collared Norma Midi Dress

Red Polka Dot Collared Norma Midi Dress

Elizabeth Polka Dot Satin Midi Tea Dress

Elizabeth Polka Dot Satin Midi Tea Dress

Elizabeth Polka Dot Satin Midi Tea Dress

Boden Puff Sleeve Ponte Shirt Dress Red Pear, Painted Dot

Puff Sleeve Ponte Shirt Dress Red Pear, Painted Dot

Boden Puff Sleeve Ponte Shirt Dress Red Pear, Painted Dot

A timeless summer staple.