Prince William and Kate Middleton took a risk by sipping an unknown drink at a street party in Windsor.

A woman gave William the drink, which he sipped trustingly before passing it on to Kate.

Princess Kate said the drink was lovely, surprising many royal fans.

The couple were mobbed by excited well-wishers, shaking hands and posing for selfies.

They spent about 45 minutes mingling with fans, making people happy during the celebrations.

One heartwarming moment showed Kate comforting a young girl who was overwhelmed to see the royal in person.

The future king was also given a can featuring King Charles III by a fan.

Some royal fans were shocked by the couple's move, as they seemingly risked their lives.

The couple's trust in the unknown drink added excitement and fascination to the already joyous event.