The Symphony No. 25 in G minor, K. 183/173dB, was written by the then 17-year-old Wolfgang Amadeus Mozart in October 1773, shortly after the success of his opera seria Lucio Silla. It was supposedly completed in Salzburg on October 5, a mere two days after the completion of his Symphony No. 24, although this remains unsubstantiated. Its first movement was used as the opening music in Miloš Forman's film Amadeus. This is one of two symphonies Mozart composed in G minor, sometimes referred to as the "little G minor symphony". The other is the Symphony No. 40; see also Mozart and G minor.