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 and the Seven Dwarfs", premiered in December 1937 and by 1939 became highest-grossing film of that time. "Snow White" was released through RKO Radio Pictures, which had assumed distribution of Disney's product in July 1937, after United Artists attempted to attain future television rights to the Disney shorts. Using the profits from "Snow White", Disney financed the construction of a new studio complex in Burbank, California. The new Walt Disney Studios, in which the company is headquartered to this day, was completed and open for business by the end of 1939. The following year on April 2, Walt Disney Productions