As long as there have been celebrity memoirs, there have been ghostwriters.
It will have surprised no one to learn that Prince Harry did not in fact sit down at a typewriter and bash out his memoir Spare, even before it was revealed that journalist, memoirist and novelist JR Moehringer was the writer. Katie Price widely acknowledged her ghostwriter, the late Rebecca Farnworth, who wrote not one, not two, but four of Price's memoirs, while musician Keith Richards' Life was written by James Fox.