OMG! We totes forgot to wish Harry Potter a Happy Birthday on Wednesday!
But someone didn't forget that July 31st was the day The Boy Who Lived started all that living- Ron Weasley!
Ch-ch-check out the video (above) to see Jimmy Fallon and a special guest send drunken birthday wishes Harry's way!
Hey, wait a second! That's not Rupert Grint! Who is it really??
It's The World's End star Simon Pegg! HIGHlarious!