The sheet music for Moon River is fairly easy to find online, although a lot of the websites will charge for the service. Free copies are quite hard to come by online with most websites promising free sheet music to get you onto the site before charging a subscription service for any sheet music. Free copies can be found online though and websites such as learn-to-play-piano-online.com/free-sheet-music.html offer the sheet music without charge. If this sheet music is not of the required standard then you could also try sheetzbox.net/piano/sheets/5412/Dean_Martin-Moon_River_PianoNotes.html, which also offers a free download of the sheet music. You may find that the quality of the free sheet music does not compare to a hard copy or a purchased online copy and as such it may be worth thinking about spending on the sheet music to ensure you have the best version available. This website does ask for donations to keep their music free though. Moon River was composed by Johnny Mercer and Henry Mancini in 1961 for the movie Breakfast at Tiffany's, where the song was sung by Audrey Hepburn. The song won an Academy Award for Best Original Song in the same year due to its use in the film. It won further acclaim in 1962 when it was awarded a Grammy Award for Record of the Year. Following the release of the film the song became famous and has since been covered by many artists including Aretha Franklin, Frank Sinatra and Shirley Bassey. Although the song was originally written in the key of C to fit the vocal range of Audrey Hepburn it can be adapted to most keys successfully. As well as the piano, sheet music can be found online to correspond to the violin, saxophone, oboe and clarinet amongst others.
Here I made it myself a piano letter music sheet
MOON RIVER
g c#dc2 b a g f g
Moon river, wider than a mile
c2 b a3 g f g c2 d
I'm crossing you in style someday
f c2 g e d c2 d c2 b3c2 f# ge
Oh, dream maker you heart breaker
d c2 e g c2 b a a# b a g g# a
Wherever you're goin', I'm going your way
CHORUS
g d c2 b3 a g f g
two drifters, off to see the world
c2 a a# b a g f g c2 c2 d
there's such a lot of world to see
e c2 e g c2 d c2 g
we're after the same rainbows end,
a# b a g f g c2 a# ba g f g
waitin' round the bend, my huckleberry friend
c2 f d e c2
moon river and me.
MOON RIVER
g c#dc2 b a g f g
Moon river, wider than a mile
c2 b a3 g f g c2 d
I'm crossing you in style someday
f c2 g e d c2 d c2 b3c2 f# ge
Oh, dream maker you heart breaker
d c2 e g c2 b a a# b a g g# a
Wherever you're goin', I'm going your way
CHORUS
g d c2 b3 a g f g
two drifters, off to see the world
c2 a a# b a g f g c2 c2 d
there's such a lot of world to see
e c2 e g c2 d c2 g
we're after the same rainbows end,
a# b a g f g c2 a# ba g f g
waitin' round the bend, my huckleberry friend
c2 f d e c2
moon river and me.