Princess Kate Middleton has a surprise gift for her husband, Prince William, on his 41st birthday.

This will be William's first birthday as the Prince of Wales.

It's also his first birthday since his father, King Charles, became the monarch after Queen Elizabeth's passing.

King Charles and other senior royals are expected to send sweet birthday wishes to William.

Last year, a special coin was released by the Royal Mint to celebrate William's 40th birthday.

The coin featured Prince William alone on one side.

Prince William, whose full name is William Arthur Philip Louis of Wales, was born on June 21, 1982, at St Mary's Hospital in Paddington.

His birth made him second in line to the throne.

Stay tuned for the surprising and fascinating story of what Kate Middleton has planned for William's special day!