American actor, singer, composer and playwright (1878–1942)
George Michael Cohan (July 3, 1878 – November 5, 1942) was an American entertainer, playwright, composer, lyricist, actor, singer, dancer and theatrical producer. Cohan began his career as a child, performing with his parents and sister in a vaudeville act known as "The Four Cohans". Beginning with Little Johnny Jones in 1904, he wrote, composed, produced, and appeared in more than three dozen Broadway musicals.
https://en.wikipedia.org/wiki/George_M._Cohan