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Dimitri Zinovievich Tiomkin (May 10, 1894 - November 11, 1979) was a Russian-born American film composer and conductor. Classically trained in St. Petersburg, Russia before the Bolshevik Revolution, he moved to Berlin and then New York City after the Russian Revolution. In 1929, after the stock market crash, he moved to Hollywood, where he became best known for his scores for Western films, including Duel in the Sun, Red River, High Noon, The Big Sky, Gunfight at the O.K. Corral, and Last Train from Gun Hill. Tiomkin received twenty-two Academy Award nominations and won four Oscars, three for Best Original Score for High Noon, The High and the Mighty, and The Old Man and the Sea, and one for Best Original Song for "The Ballad of High Noon" from the former film.

Tiomkin received his first break from Columbia director Frank Capra, who picked him to write and perform the score for Lost Horizon (1937). The film gained significant recognition for Tiomkin in Hollywood. It was released the same year that he became a naturalized U.S. citizen.  In his autobiography, Please Don't Hate Me! (1959), Tiomkin recalls how the assignment by Capra forced him to first confront a director in a matter of music style:  [H]e gave me the job without reservation. I could write the score without interference, and he would hear it when it was done. Lost Horizon offered me a superb chance to do something big... I thought I might be going a little too far in the matter of expense, and went to Frank one day as he sat in the projection room [and explained the score.]... He looked shocked. "No, Dimi, the lama is a simple man. His greatness is in being simple. For his death the music should be simple, nothing more than the muttering rhythm of a drum." "But Frank, death of lama is not ending one man, but is death of idea. Is tragedy applying to whole human race. I must be honest. Music should rise high, high. Should give symbolism of immense loss. Please don't hate me."  He worked on other Capra films during the following decade, including the comedy You Can't Take It With You (1938), Mr. Smith Goes to Washington (1939), Meet John Doe (1941), and It's a Wonderful Life (1946). During World War II, he continued his close collaboration with Capra by composing scores for his Why We Fight series. These seven films were commissioned by the U.S. government to show American soldiers the reason for United States participation in the war. They were later released to the general U.S. public to generate support for American involvement.  Tiomkin credited Capra for broadening his musical horizons by shifting them away from a purely Eurocentric and romantic style to a more American style based on subject matter and story.

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Dimitri Tiomkin