The royal was spotted with two of his longtime pals watching their favorite soccer team Aston Villa in a high-pressure match.

Princess Kate and Prince William have shown unprecedented openness about their relationship following Catherine's cancer journey, according to sources close to the royal household. A source told People magazine that the Prince and Princess of Wales are "more open" now and "talk about their relationship together.

Earlier today, Prince William had an official royal engagement in London, in which he visited homelessness charity Centrepoint. Just hours after his public appearance, the Prince of Wales jetted off to Monaco where he was photographed watching his favorite soccer team, Aston Villa, compete in the UEFA Champions League.

The Prince of Wales made a surprise appearance in Monaco on Tuesday, where he was spotted watching Aston Villa play in the Champions League with one of his closest friends and Princess Charlotte's godfather,

Princess Kate stayed home with Prince George, Princess Charlotte and Prince Louis as Prince William left the UK. The Prince of Wales, 42, travelled to Monaco without his wife and three children to watch his beloved Aston Villa lose 1-0 to the hosts.