The Secret of NIMH is a 1982 American animated fantasy adventure film directed by Don Bluth in his directorial debut and based on the 1971 children's novel Mrs. Frisby and the Rats of NIMH by Robert C. O'Brien. The film features the voices of Elizabeth Hartman, Peter Strauss, Arthur Malet, Dom DeLuise, John Carradine, Derek Jacobi, Hermione Baddeley, and Paul Shenar. The film was released in the United States on July 2, 1982, by MGM/UA Entertainment Co. It was followed in 1998 by a direct-to-video sequel, The Secret of NIMH 2: Timmy to the Rescue, which was made without Bluth's involvement or input. In 2015, a live-action/computer-animated remake was reported to be in the works.[4]