Achingly groovy, Blow-up features David Hemmings, Vanessa Redgrave, and the beautiful Jane Birkin, later Mrs. Serge Gainsbourg, in an absolute rave-up of a film.
This film inspired Brian DePalma's 1978 film Blow Out with John Travolta and Nancy Allen.
The soundtrack is fantastic. Featuring a groovy score by Herbie Hancock and a couple tracks from The Yardbirds.
The clip below is quite possibly the grooviest ever committed to celluloid (note Jeff Beck's Townsend inspired performance, Antonioni wanted The Who, and see if you can spot Monty Python's Michael Palin):