American cinema, which emerged in the early 20th century is today the dominant force in world cinema. With several hundred movies made every year, the United States is one of the most prolific producers of films in the world and unsurprising home to many of the best known actors in the international scenario. Acting as a profession thrived in the U.S. even before the advent of motion pictures. Edwin Thomas Booth, a prominent theater actor famous for performing Shakespearean plays is considered by several theatrical historians to be the greatest American actor. Claude Cooper was another theater actor who successfully forayed into films as well. Early 20th century actors Lionel Barrymore, Al Jolson—dubbed as "The World's Greatest Entertainer”, and Warner Oland played a vital role in popularizing American cinema. The Golden Age of Hollywood led to the emergence of many other distinguished actors like "King of Hollywood" Clark Gable, Spencer Tracy, and Paul Stewart. With time American actors adopted a more polished and sophisticated style, and it comes as no surprise that Hollywood in the late 20th century was dominated by stylish stars like Sylvester Stallone, Arnold Schwarzenegger, Bruce Willis, and Steven Seagal. Read on to know about the life and works of famous American actors.