The Walt Disney Company and starred in several Disney produced films. Ub Iwerks refined Disney's initial design of Mickey Mouse. Disney's first sound film "Steamboat Willie", a cartoon starring Mickey, was released on November 18, 1928 through Pat Powers' distribution company. It was the first Mickey Mouse sound cartoon released, but the third to be created, behind "Plane Crazy" and "The Gallopin' Gaucho". "Steamboat Willie" was an immediate smash hit, and its initial success was attributed not just to Mickey's appeal as a character, but to the fact that it was the first cartoon to feature synchronized sound. Disney used Pat Powers' Cinephone system,
The Walt Disney Company Ed Catmull took over as President of Pixar Animation Studios. Former Executive Vice-President of Pixar, John Lasseter, became Chief Creative Officer of Walt Disney Animation Studios, its division Disneytoon Studios, and Pixar Animation Studios, as well as assuming the role of Principal Creative Advisor at Walt Disney Imagineering. In February 2006, Disney acquired the rights to Oswald the Lucky Rabbit from NBC Universal (including the character's intellectual property and the 26 Oswald cartoons produced by Walt Disney) as part of an exchange of minor assets. In return, Disney released sportscaster Al Michaels from his contracts with ABC Sports and ESPN,