The song was written by Kenny Gamble and Leon Huff, and first recorded by the group Harold Melvin & the Blue Notes in September 1972, reaching #1 on the US R&B chart. “If You Don’t Know Me by Now” was originally written for Labelle but they never recorded it.
Simply Red’s version of “If You Don’t Know Me by Now” was released as the second single from their third studio album “A New Flame” on March 27, 1989 with “Move on Out” on the B-side. The single hit number one spot in the United States, Australia and New Zealand, and won the Grammy Award for the Best R&B Song of 1989. In the UK, it peaked at #2. The songs is featured the films Class Action (1991) and American Psycho (2000).