Despite Plane Crazy being produced earlier , Disney considers Steamboat Willie to be Mickey Mouse 's debut .
Walt Disney fails to find a distributor for his first Mickey cartoon until March 1929 , five months after Steamboat Willie 's release .
Despite Plane Crazy being produced earlier , Walt Disney considers Steamboat Willie to be Mickey   's debut .
Walt Disney fails to find a distributor for his first Mickey cartoon until March 1929 , five months after Steamboat Willie 's release .