Clarence Sinclair Bull was born in Sun River, Montana in 1896. His career began when Sam Goldwyn hired him in the year of 1920 to photograph publicity still shots of the stars in the studio. When Metro-Goldwyn-Mayer was founded in the year of 1924, Clarence Bull was appointed to be the photographer publicity stills of the studio's stars. He is mainly popular for his photographs of Greta Garbo during the years of 1926-1941. Clarence Bull's first portrait of Garbo was a costume study for the Flesh and the Devil, and it was photographed on September 1926.
Bull was able to study with the great Western painter, Charles Marion Russell. He also served as an assistant cameraman in the year of 1918. Bull was skilled in the areas of lighting, retouching, and printing. Clarence Bull was commonly addressed as C.S. Bull.