"In the Mood" is a popular big band-era jazz standard recorded by American bandleader Glenn Miller.

In 1999, National Public Radio (NPR) included the 1939 Glenn Miller recording in its list of "The 100 most important American musical works of the 20th century".

[4][5] "In the Mood" starts with a saxophone section theme based on repeated arpeggios that are rhythmically displaced; trumpets and trombones add accent riffs.

[6] At the end of the song, a coda climbs triumphantly, then sounds a sustained unison tonic pitch with a rim shot.

The main theme with repeated arpeggios rhythmically displaced appeared under the title "Tar Paper Stomp" and was credited to trumpeter Wingy Manone.

Manone raised the similarity between "Tar Paper Stomp" and "In the Mood" to Joe Garland and to the publisher Shapiro, Bernstein, and Company of New York.

Before offering it to Miller, Garland sold it in 1938 to Artie Shaw, who chose not to record it because the original arrangement was too long, but he did perform it in concert.

Two copyrights were filed by Joseph Copeland Garland on June 8 and November 26, 1938,[14] before the song was published by Lewis Music Pub.

A final copyright was filed by Shapiro, Bernstein on December 11, 1939, worded as follows: "In the mood; fox-trot, Andy Razaf & Joe Garland, arr.

The 1960 reprint credited only to Garland (with piano arrangement by Robert C. Haring) is in G and has lyrics beginning: "Who's the livin' dolly with the beautiful eyes?"

On August 1, 1939, Miller's version was recorded at the RCA Victor Studios at 155 East 24th Street in New York City.

The personnel on Miller's recording included Al Mastren and Paul Tanner on trombone; Clyde Hurley, Legh Knowles, and Dale McMickle on trumpet; Wilbur Schwartz on clarinet; Hal McIntyre on alto saxophone; Tex Beneke, Al Klink, and Harold Tennyson on tenor saxophone; Chummy MacGregor on piano; Richard Fisher on guitar; Rowland Bundock on double bass; and Moe Purtill on drums.

A new recording by Glenn Miller with the American Band of the Allied Expeditionary Forces (AEF) was broadcast to Germany in 1944 on the radio program The Wehrmacht Hour.

[23] In the winter of 1977, a novelty version by the Henhouse Five Plus Too (a Ray Stevens project) employing the sounds of clucking chickens entered the U.S.