Robert Mitchum was a prolific American actor who appeared in more than 110 films and TV series throughout his career. Best remembered for his roles in several classic film noirs, he is ranked No. 23 on the American Film Institute's list of the 50 greatest American screen legends. He began his Hollywood career as an extra, playing minor and supporting roles. Eventually, he entered the film noir genre with a supporting role in the B-film When Strangers Marry, and it did not take him long to establish himself as a major actor in the genre. After being cast as Lt. Walker in Story of G.I. Joe, his popularity soared, and he became a highly sought-after actor in Hollywood. A known troublemaker in his youth, he was a tough guy both on and off the screen. His "bad boy" image lent him an air of mystery and made him even more appealing to audiences. Interestingly, his troubles with the law did not harm his career—in fact, they made him even more famous! He was once arrested for marijuana possession and spent a week in county jail. The films released soon after his arrest became box office hits. In addition to acting, he was also a moderately successful singer and composer.