"I Didn't Know I Loved You (Till I Saw You Rock and Roll)" is a song by English glam rock singer Gary Glitter, written by Glitter with Mike Leander and produced by Mike Leander.

It was released as the second single from his debut studio album, Glitter (1972) and peaked at No.

It was also Glitter's second and last charted record in the US, peaking at #35.

Rock Goddess and Planet Patrol both recorded cover versions in 1983.

This 1970s pop song–related article is a stub.