United Kingdom, June 15 -- King Charles has wished dads "everywhere" a Happy Father's Day.

The 76-year-old monarch is father to Prince William, 42, and 40-year-old Prince Harry with his late ex-wife Diana, Princess of Wales - who was killed in a car crash in 1997 at the age of 36 - and as he celebrated the special day on Sunday (15.06.25), he remembered to acknowlede dads around the world as well.

Alongside an old black-and-white photo of himself and his sons, he wrote on Instagram: "To all Dads everywhere, we wish you a happy Father's Day today."

The king has become somewhat estranged from his youngest son since he and his wife Meghan, Duchess of Sussex relinquished royal duties five years ago in favour of a life in LA.

Harry - who t...