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,
Walt Disney Television (production company) was split into two units: Walt Disney Television (WDT) and Walt Disney Network Television (WDNT). WDT would be headed by Hirschhorn as president and consisted of Disney Telefilms and Walt Disney Television Animation, including Disney MovieToons/Disney Video Premiere. Leah Keith and Peter Green were promoted to production vice presidents for the division in March 1998. Walt Disney Television (production company) Walt Disney Television was the name of the television production division of The Walt Disney Company. Walt Disney Television's television productions are broadcast, mostly on Disney Channel, Disney Junior, Disney XD, ABC. Today, the majority of Walt Disney Television's productions