Clint Eastwood
Clint Eastwood's distinguished film career began in 1955. Eastwood got his first big break playing an uncredited lab assistant named Jennings in Revenge of the Creature, the sequel to Creature from the Black Lagoon (1954). Eastwood's character is shown having a discussion with Professor Ferguson in which he accuses a test subject cat of having eaten a lab rat—before finding the rat in his lab coat pocket.