Marilyn Monroe was an American actress who appeared in 29 films between 1946 and 1961. After a brief career in modeling she signed short-term film contracts, first with 20th Century Fox, then Columbia Pictures, and appeared in minor roles for the first few years of her career. In 1950, she made minor appearances in two critically acclaimed films, The Asphalt Jungle and All About Eve. The parts in the two films were against many of the roles into which she was typecast, that of the dumb blonde. Margot A. Henriksen, her biographer with the American National Biography, considers the typecast "an unfair stereotype that bothered her throughout her career".