"Moon River" is a song composed by Henry Mancini with lyrics by Johnny Mercer. It was originally performed by Audrey Hepburn in the 1961 movie Breakfast at Tiffany's, winning an Academy Award for Best Original Song. The song also won the 1962 Grammy Awards for Record of the Year and Song of the Year. The Telegraph listed, among prominent covers of the song, those by Frank Sinatra, Judy Garland, Sarah Vaughan, Louis Armstrong, Barbra Streisand and Rod Stewart.

This arrangement for brass quartet includes the following parts: Bb Trumpet 1, Bb Trumpet 2, Trombone or F Horn, Tuba.
It is suitable for classroom, repertoire, wedding and recital.