It's Mickey Mouse's birthday! The official mascot of Disney and one of the most recognizable cartoon characters of all time turns 88 on Friday. Hey, everybody! It's my birthday and today I'm taking over Disney Twitter! YZ< -Mickey Mouse #HappyBirthdayMickey pic.twitter.com/1G6NQVCAM8 Walt Disney poses with his wife, Lillian, and one of his creations, Mickey Mouse, on the roof of Grosvenor House in London on June.