Moon River by Henry Mancini, featured in the 1961 film Breakfast at Tiffany's. This arrangement comes from Hal Leonard's "Piano Solos for All Occasions" - I was unable to find an arranger's name.
You can buy it here: https://www.sheetmusicplus.com/en/pro... (affiliate link - I may receive a commission if you make a purchase after clicking). Moon River is one of the easier pieces in the collection.
Visuals created using the SeeMusic app. Disclaimer: Apart from looking pretty, SeeMusic is useful for showing beginners how to play simple songs, but for anything more complicated I strongly recommend learning from sheet music.
