Jan Hammer (Czech pronunciation: [ˈjan ˈɦamɛr]) (born 17 April 1948, in Prague, then Czechoslovakia, today the Czech Republic) is a composer, pianist and keyboardist. He is probably best known for playing keyboards with the Mahavishnu Orchestra in the early 70s, as well as his "Miami Vice Theme" and "Crockett's Theme", from the popular 1980s US television program, Miami Vice.
Hammer has collaborated with some of the era's most influential jazz and rock musicians such as Jeff Beck, Al Di Meola, Mick Jagger, Carlos Santana, Stanley Clarke, Neal Schon, Steve Lukather, and Elvin Jones among many others. He has composed and produced at least 14 original motion picture soundtracks, the music for 90 episodes of Miami Vice and 20 episodes of the popular British television series Chancer.
His compositions have won him several Grammy awards.