Instrumental Duet Flute,Instrumental Duet,Piano - Level 1 - Digital Download SKU: A0.1006331 By Henry Mancini. By Henry Mancini. Arranged by Gandhi Martinez. Oldies. Score and parts. 5 pages. Gandhi Martinez #6622039. Published by Gandhi Martinez (A0.1006331). Easy and beautiful arrangement of Moon River for piano and flute beginners.The arrangement was conceived in order to promote an easy reading of the work. The pianist play an simple accompaniment and the flute play the melody in single-note style. Moon River was composed by Henry Mancini (to lyrics by Johnny Mercer), and was famously performed by Audrey Hepburn in the film Breakfast at Tiffany's (1961). Thanks to her performance, the song won an Academy Award (Best Original Song) as well as two Grammy Awards (Record of the Year and Song of the Year) in 1962.