Mickey
Mouse debuted on November 18, 1928 in the animated cartoon Steamboat Willie.
His
comics debut was January 13, 1930 when he got his own comic strip. (The
first adventure was Lost on a Desert Island.) The strip was first written
by Walt Disney himself
(and
drawn by Ub Iwerks), but soon Floyd Gottfredson took over the strip and
continued to draw it for decades.