Kingdom Hearts (キングダム ハーツ Kingudamu Hātsu?) is a video game series developed and published by Square Enix. It is a collaboration between Square Enix and Disney Interactive Studios, and is under the direction of Tetsuya Nomura, a longtime Square Enix character designer. Kingdom Hearts is a crossover of various Disney settings based in a universe made specifically for the series. The series features an all-star voice cast, which includes many of the Disney characters' official voice actors and well-known celebrities such as Haley Joel Osment, David Gallagher, Jesse McCartney, Hayden Panettiere, Christopher Lee, Willa Holland, Jason Dohring, Mark Hamill, and Leonard Nimoy. Characters from Square Enix's Final Fantasy series make appearances and interact with the player and the Disney characters. The series centers around the main character Sora's search for his friends and his encounters with Disney and Final Fantasy characters on their worlds. Ad from January 2011.