Who wrote Dolly Parton and Kenny Rogers’ "Islands in the Stream"?

Barry Gibb was already producing Kenny Rogers' entire album at the time, so it only makes sense that he'd write "Islands in the Stream" along with his Bee Gees bandmates and brothers. The song was either written for Diana Ross or Marvin Gaye depending on which Gibb brother you ask, but it was refashioned from an R&B/Soul song into a country pop song. Rogers felt like the song was missing something, and Gibb was the one to suggest it needed Dolly Parton, who was luckily recording her own music in the same building. After she agreed, it was finally recorded as a duet, and became both artists' second number one song.