Monday was a big day for some people, who finally got the chance to celebrate their birthday for the first time in four years.
For example: On Monday, rapper and actor Ja Rule will celebrate his 40th birthday. However, technically Rule will only turn 10.
The reason is quite simple: Rule is one of approximately 200,000 Americans whose birthday comes every four years on Feb. 29, also known as Leap Day.
It’s an occurrence that happens once every 1,426 days.
It puts Ja Rule in select company with other popes, athletes, writers and politicians.
Flip through the gallery below to see some other famous or notable people who are technically far younger than they look thanks to being born on Leap Day.