The heat appeared to be getting to Princess Charlotte(Image: AP)

Princess Charlotte has made a sweet reference to her grandmother, the late Diana, Princess of Wales, at Wimbledon. The royal box at Wimbledon hosted Prince William, Princess Kate and their eldest two children at the men’s singles final this afternoon. They were among the guests at Centre Court for the final day of the tennis tournament.

Prince William and Princess Kate, both 43, were seated on the front row of the box on Centre Court with Prince George, 11, and Princess Charlotte, 10, earlier. They then watched as reigning champion Carlos Alcaraz competed against rival tennis player Jannik Sinner for the title.

The family were spotted at the All England Lawn Tennis and Croquet Club in London. Princess Charlotte, who is third in line to the British throne, has attracted some attention over her choice of makeup, with her nails having been painted pink ahead of the visit.

Charlotte’s pink nail varnish was clearly visible(Image: WireImage)

Her choice of nail polish was on display at times as she watched matches on the court, including when Princess Charlotte covered her mouth. The colour was also visible when she held a fan amid the heatwave this weekend.

Princess Charlotte’s bright nails could be seen as her breaking from tradition, given previous speculation, though that doesn’t appear to be the case. There’s been speculation over the years that members of the Royal Family are encouraged to wear neutral colours and pale shades.

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Commentators have shared their thoughts on the situation in the past. Richard Fitzwilliams once told MailOnline: “[They] are encouraged to use neutral, understated colours for their nails.”

They were joined by Prince William (left) and Prince George (centre left) for the men’s singles final and other matches at the venue(Image: Anadolu via Getty Images)

It’s been described as a “rule” and a “protocol” in the past, though it’s thought that there isn’t actually a ban or a formal rule on any colour or shade of nail polish. Princess Charlotte’s mother, Princess Kate, has herself opted for bold colours on occasion, for example, and pink isn’t thought to be prohibited either.

Queen Elizabeth was said to have worn one shade of pink nail polish for over 30 years. The late monarch reportedly favoured the brand Essie’s Ballet Slippers shade after first wearing the colour, described as “pale pink”, since 1989.

Princess Charlotte’s nail polish is said to match her late grandmother Princess Diana’s favourite colour(Image: Tim Graham Photo Library via Getty Images)

The choice of colour by Princess Charlotte could be seen as a tribute to her late grandmother, Diana, who had been known to sport pink outfits. Pink was her “favourite” colour, according to the likes of British Vogue.

The exhibition Princess Diana: Accredited Access, which had been on display in London last year, suggested similarly in a post shared on social media in 2023. Alongside photos of Princess Diana in pink, it described the colour as “nurturing”.

The post shared by the exhibition on Instagram read: “Princess Diana’s favourite color was … PINK! Pink is a nurturing, playful, and nostalgic color that takes people back to their childhoods and can also represent universal love and friendship.”