Ganz kleine Nachtmusik (German for Quite (or Very) Little Night Music), K. 648,[1] also known as Serenade in C,[2] is a composition for string trio by Wolfgang Amadeus Mozart (1756–1791), written in the mid to late 1760s.

[2] The piece itself is a string trio (for two violins and one cello) written while Mozart was a young teenager, apparently before his first trip to Italy.

The researchers reported that the manuscript was in "dark brown ink on medium-white handmade paper" with individually bound parts.

[5] On 19 September 2024, the rediscovered piece was first played for a modern audience at the Mozarteum in Salzburg, Austria, by Haruna Shinoyama and Neža Klinar (violins), Philipp Comploi (cello) and Florian Birsak (harpsichord),[6] with a further performance in Germany on 21 September by Vincent and David Geer (violins) and Elisabeth Zimmermann (cello) at the Leipzig Opera.

[3][7][8] The first commercial recording was released by Deutsche Grammophon featuring the Leipzig Gewandhaus Orchestra conducted by Herbert Blomstedt on 18 October 2024.