Prince William shares sweet moment with Princess Eugenie, playfully teasing her during a day out at Royal Ascot

Prince William shared a sweet moment with his cousin Princess Eugenie as the two attended Royal Ascot in Berkshire earlier today.

The Prince of Wales, 41, was spotted gently teasing his younger cousin, lightly teasing her choice of headgear.

Eugenie, whose parents are Sarah Ferguson and Prince Andrew, opted for a pink ensemble for her day at the races.

The 34-year-old paired her dress with a baby pink hat, featuring a long tassel, which fell almost to her collar. 

To complete the ensemble, she wore light make-up, pairing glowy peach flushed cheeks with full eyelashes and glossy lips.

Prince William (right) shared a joke with his younger cousin, Princess Eugenie (left), on the second day at the Royal Ascot

The Prince of Wales grinned playfully at Eugenie who attempted to cling onto her thick pink tassel 

In a cheeky show of affection, William playfully flicked the tassel that fell in front of his cousin's smiling face. 

Royal Ascot, a five-day flat horse racing event held annually at Ascot racecourse in Berkshire, is a major event in the social calendar.

And it is popular with many royals, notably, the late Queen Elizabeth II, who famously loved the race so much that after she died, some thought The Firm's connection with it may end. 

However, King Charles has attended both Royal Ascots during his reign so far.

Prince William didn't just spend his day teasing his cousins, he proved his good nature and gentlemanly heart after he helped his mother-in-law get out of a sticky situation.

Carole Middleton was giving her first public appearance following her daughter's cancer diagnosis when she had the misfortune of ending up with her heel stuck in the grass.

William offered her his hand to grab onto after the heel of her right shoe got trapped in the turf. 

The pair were seen laughing off the shoe mishap as they walked off together and joined other guests.

Prince William (pictured, right) stands with Princess Beatrice (pictured, centre) and her sister Eugenie

Princess Eugenie, 34, wore summery make-up, pairing peach blush with full eyelashes and  glossy lips

The cousins (pictured) appeared to be enjoying spending some time together at Royal Ascot today

Carole Middleton wrapped her arm affectionately around Eugenie who wore her hair in an up do, revealing her unusual tattoo

At one stage, Eugenie was spotted catching up with Carole, who wrapped her arm affectionately around the princess while they chatted.  

With her tresses pulled into an up do, the princess's tattoo, a circle just behind her ear, was visible.

The inking was first spotted when she attended the Platinum Jubilee National Service.

Though Eugenie has never revealed the meaning behind her tattoo, some believe circles can represent the cycle of life and death, or may symbolise perfection, wholeness and totality.