Ka kammala wannan magana: A shekara ta 1936, Ritter ya koma Los Angeles. Fim din fim dinsa na farko shi ne a cikin "Song of the Gringo" (1936) don Grand National Pictures. Ya ci gaba da fitowa a fina-finai 70 a matsayin dan wasan kwaikwayo, da 76 a kan fina-finai na fina-finai. Ya jawo hankali na musamman a cikin 1952 don fassararsa na "The Ballad of High Noon" a kan bayanan buɗe fim ɗin "High Noon", kuma daga baya ya rera shi a wannan shekarar
bikin Academy Awards, inda ya lashe Kyautar Kyauta ta Musamman.