"In the Mood" was the signature tune of Glenn Miller and one of the most well-known arrangements of the Big Band era. Miller's rendition topped the charts at #1 in 1940.

The song was composed by Red Garland and Andy Razaf.

The song also charted at #16 in 1953 with Johnny Maddox.

Other notable big band artists who recorded the song include the Andrews Sisters, Xavier Cugat, Tommy Dorsey, Duke Ellington, Benny Goodman, and Artie Shaw.

Non-Big band renditions were recorded by Jerry Lee Lewis, Johnny Lee Hooker, and Chet Atkins.

Glenn Miller's version is known to many younger people through its use as the instrumental theme in the sampled medley "Swing the Mood", a #1 hit in many countries in the late 1980's by Jive Bunny and the Mastermixers.