Moon River began as a classic song from the 1961 film Breakfast at Tiffany's, written by Henry Mancini and Johnny Mercer, and it has since become a jazz standard covered in many styles. Its connection to Bayonetta comes from the stylish action game series, where its cool, sultry sound fits the title character's elegant and confident persona. Fans have lifted the rendition for edits and tributes, sharing it as a short clip because it instantly signals class, mystery and playful charm without needing any dialogue.