The Formula is a 1980 mystery film directed by John G. Avildsen. It was produced and written by Steve Shagan, who adapted his own 1979 novel The Formula. It stars Marlon Brando, George C. Scott, Marthe Keller, John Gielgud, G. D. Spradlin, and Beatrice Straight.

John Guilbert Avildsen was an American film director. He is best known for directing Rocky (1976), which earned him the Academy Award for Best Director. He is also renowned for directing the first three films in The Karate Kid franchise (1984–1989). Other films he directed include Joe (1970), Save the Tiger (1973), The Formula (1980), Neighbors (1981), Lean on Me (1989), Rocky V (1990), 8 Seconds (1994), and Inferno (1999).