Walt Disney, Ub Iwerks, and Les Clark are responsible for the creation and design of Mickey Mouse (originally called Mortimer Mouse, but his wife persuaded him to change it).
One source says MM was created by Walt Disney, and that MM was
usually drawn by the head animator at the studio Ub Iwerks
[original name Ubbe Ert Iwwerks]. The same source says he was
created by Walt Disney and Ub Iwerks. Another source say that Ub
Iwerks is best known for creating MM, together with Walt
Walt Disney made mickey mouse. He started his very own cartoon by having it put in a newspaper.