Yep, the other boy who rose to fame in the Harry Potter films is all grown up and turning 24.
While Rupert deserves a millions of thank-yous for being the perfect Ronald Weasley, he's got a lot of other reasons to party this year too.
This past July, Grint carried the Olympic torch during the 2012 London torch relay. And he was recently cast in the upcoming Dennis Wilson-Beach Boys biopic, The Drummer, costarring Chloë Grace Moretz.
So, however you celebrate, Rupert, we hope your birthday is magical!