text: The first ever fully synchronized sound cartoon, Walt Disney's Mickey Mouse makes his screen debut in the exceptionally entertaining cartoon short subject "Steamboat Willie". Mickey is a worker on a steamboat under the supervision of captain Peg Leg Pete(or Pete as he would later be called). Mickey boards his long time companion Minnie Mouse aboard the train as they frolic about, while Mickey attempts to impress Minnie. This short was wildly fun and positively entertaining. Animators Ubbe Iwerks, Rudolph Ising, and Hugh Harman assisted Walt on the creation of the short."Steamboat Willie" essentially marks the beginning of the success of the Walt Disney Company.