The graduate soundtrack by Simon and Garfunkel. Mrs. Robinson was a work in progress and adapted to fit the movie, and sound of silence, and Scarborough fair are classics of the period and folk rock pillars of the century.

Interestingly, this was one of if not really the first time popular, contemporary artists had their music featured in a film. Prior, scoring a film was the purview of someone with a music phd. Talk about the beginning of sea change for the industry.