An unauthorized biography sometimes called a kiss-and-tell, or a tell-all, is a biography written without the subject's permission or input. The term is usually restricted to biographies written within the subject's lifetime or shortly after their death; as such, it is not applied to biographies of historical figures written long after their deaths.

Personality Comics was a short-lived American comic book publishing company that specialized in unauthorized biographies of entertainers and professional athletes, adult comics, and parodies, frequently combining all three genres.