Louis Hirsch (1892–1943) was an American composer and songwriter primarily known for his contributions to the genres of musical theater and popular music during the early 20th century. Hirsch gained prominence in the 1910s and 1920s, creating music for several successful Broadway shows. Notable works include the scores for "The Little Whopper" (1920) and "For Goodness Sake" (1922), as well as a number of hit songs like "Ain't She Sweet," which became a jazz standard, and "My Blue Heaven," co-written with George A. Whiting, which remains a beloved classic. Hirsch's compositions often featured catchy melodies and relatable lyrics, capturing the spirit of the era and influencing subsequent generations of songwriters. His work in musical theater helped lay the groundwork for the evolving American musical style, blending elements of vaudeville and jazz. Despite his relatively brief career, Hirsch's impact can be seen in the enduring popularity of his songs and the way they have been interpreted by numerous artists across various genres. His legacy endures through the continued performance and recording of his music, reflecting the rich tapestry of early American popular culture.