Matt Dennis (February 11, 1914–June 21, 2002) was a singer, pianist, band leader, arranger, and writer of music for popular music songs.

He was born in Seattle, Washington. His mother was a violinist and his father a singer, and the family was in vaudeville, so he was early exposed to music. In 1933 he joined Horace Heidt's orchestra as a vocalist and pianist. Later on, he formed his own band, with Dick Haymes as vocalist. He became vocal coach, arranger, and accompanist for Martha Tilton, and worked with a new vocal group, the Stafford Sisters. Jo Stafford, one of the sisters, joined the Tommy Dorsey band in 1940 and persuaded Dorsey to hire Dennis as arranger and composer. Dennis wrote prolifically, with fourteen of his songs recorded by the Dorsey band in one year alone, including "Everything Happens to Me," an early hit for Frank Sinatra.

After three and a half years in the United States Air Force in World War II, Dennis returned to music writing and arranging, getting a boost from his old friend Dick Haymes, who hired him to be the music director for his radio program. With lyricist Tom Adair he wrote songs for Haymes' program.

Dennis recorded six very fine albums most of which are out of print, but are available as import CDs from Japan. His wife was the singer Virginia Maxey.

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