Irving Caesar (born Isidor Keiser, July 4, 1895 – December 17, 1996)[3] was an American lyricist and theater composer who wrote lyrics for numerous song standards, including "Swanee", "Sometimes I'm Happy", "Crazy Rhythm", and "Tea for Two", one of the most frequently recorded tunes ever written.

[5] Caesar, the son of Morris Keiser, a Romanian Jewish lawyer and socialist, was born in New York City, United States.

In his career, Caesar collaborated with a wide variety of composers and songwriters, including Rudolf Friml, George Gershwin, Sigmund Romberg, Victor Herbert, Ted Koehler and Ray Henderson.

[4] Another of his biggest hits, "Animal Crackers in My Soup", was popularized by Shirley Temple in her 1935 film Curly Top.

In the late 1930s, along with composer Gerald Marks, he wrote a famous series of children's songs focusing on safety.