David Mann (David Freedman), October 3, 1916, Philadelphia, Pennsylvania — March 1, 2002, New York) was an American songwriter of popular songs. His best-known songs are "There! I've Said It Again" (1945), popularized first by Vaughn Monroe and later by Bobby Vinton, "No Moon At All" (1947), recorded by Robert Goulet in (1963) and "In the Wee Small Hours of the Morning" (1955), recorded most notably by Frank Sinatra, but covered by many other artists over the decades.
Mann was able to play the piano by ear, at the age of 4, and by age 13, he was playing around Philadelphia. He attended the Curtis Institute of Music. In late 1939, Mann moved to New York and became a Decca Records session musician. He was in Charley Spivak's orchestra until 1941.
During World War II, Mann joined the United States Army. Upon his discharge from the Army in 1945, they had the honor of placing Mann as personal pianist to President Truman. Mann worked on or appeared in the films: Twenty Grand, I Dood It, Four Jills and A Jeep, Pin-Up Girl, and (during his Artie Shaw days) Second Chorus.