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 Pictures first of the "True-Life Adventures" series and a subsequent Academy Award winner for Best Live-Action Short Film. Walt Disney Productions had its first fully live-action film in 1950 with the release of "Treasure Island""," considered by Disney to be the official conception for what would eventually evolve into the modern-day Walt Disney Pictures. By 1953, the company ended their agreements with such third-party distributors as RKO Radio Pictures and United Artists and formed their own distribution company, Buena Vista Distribution. The division was incorporated as Walt Disney Pictures on April 1, 1983 to diversify film subjects and expand audiences for