The UK's King Charles III has the distinction of having held the title of "Prince of Wales" for more than 64 years—making him the longest-serving Prince of Wales, as well as the oldest person to have held the position.

King Charles and Queen Camilla were joined by Prince William and Kate, the Princess of Wales, Princess Anne and the Duke and Duchess of Gloucester for the event at Westminster Abbey.

I’m still recovering from all the PDA photos that surfaced after Prince William and Kate Middleton stepped out for Commonwealth Day. The same can’t be said for the Prince of Wales, 42, who took on a surprising new role just one day later.

A lipreader has decoded what King Charles said to his eldest son at the annual Commonwealth Day at Westminster Abbey.

Princess Kate and Prince William appear to have snubbed Prince Edward as they did not post a birthday message to the Duke of Edinburgh. Prince Edward celebrated his 61st on Monday and received a public birthday message from King Charles and Queen Camilla via the official Royal Family social media account.