Classical music has been used over the years in movies. And at times, it is given an "updated" version for the times.
Deodato - Also sprach Zarathustra
The theme to 2001: A Space Odyssey. Deodata created this funky version of the piece in 1973.
Walter Murphy & the Big Apple Band - A Fifth Of Beethoven
The 7" version of the song. Walter Murphy made a disco version of classical music songs in 1976. The album had the same name as this song.