They sure do grow up fast! And the old saying even applies to royals!
For proof, look no further than Prince George's official birthday photo. He turns five on Sunday and he couldn't be more giddy over it.
"The Duke and Duchess of Cambridge are very pleased to share a new photograph of Prince George to mark his fifth birthday," Kensington Palace wrote along with the shot of George showing off his pearly whites. "Thank you everyone for your lovely messages."
George even got his own commemorative coin for the big day.
It feels like only yesterday when the world watched with bated breath as Britain awaited the arrival of its likely future monarch.
As the eldest child of Prince William, George is in line to take over the throne from his dad, just as William will take over for Prince Charles one day.
Per a royal family statement, George's adorable snapshot was taken in the garden at Clarence House by Matt Porteous on July 9 following the christening of his new little brother, Prince Louis.
Louis, the newest member of the royal family, was born in April.