Who wrote the movie 'When a man loves a Woman'?

Percy Sledge had a hit with it in 1966. Ben E King had an earlier hit with it, possibly in 1964, either with or without the Drifters, but I cannot find any specific detail. You wouldn't be able to find anything about Ben E King and The Drifters, because they did not record it back then. Percy Sledge actually wrote the song and first recorded it. See the link below.