Henry Farrell was an American novelist and screenwriter, best known as the author of the renowned gothic horror story What Ever Happened to Baby Jane?, which was made into a 1962 film starring Bette Davis and Joan Crawford.

Farrell was born Charles Farrell Myers in California, and grew up in Chowchilla, California. Under the name Charles F. Myers, he wrote the "Toffee" short stories in SF magazines in the 1940s and 1950s. Later taking the pseudonym Henry Farrell, his first novel was The Hostage, published in 1959. He would publish five novels between 1959 - 1967.

He also wrote numerous teleplays for television movies and series such as Perry Mason and Alfred Hitchcock Presents

Farrell passed away in his home in Pacific Palisades, California at age 85. According to his obituary, he completed another novel, titled A Piece of Clarisse, shortly before his death. There is currently no word on publication.