The role of Julius Caesar in the 1960 film "Spartacus" was played by John Gavin. Gavin, born Juan Vincent Apablasa Jr. (April 1931 – February 2018), was a professional American movie actor. He was best known for his performances in the films: "Imitation of Life" (1959), "Spartacus" (1960), "Psycho" (1960), and "Thoroughly Modern Millie" (1967). To his credit, he had the opportunities to play leading roles in a series of films for producer Ross Hunter.

In his life in addition to acting, he was the president of the Screen Actors Guild (1971–73). Before the 1970s from 1961 to 1965, Gavin was also a cultural adviser to the Organization of American States. Twenty years later from 1981 to 1986, Gavin became the United States Ambassador to Mexico.

John Gavin was born in Los Angeles, California; he died of complications from pneumonia at the age of 86 in Beverly Hills, California, USA. During his life, he first attended Roman Catholic schools, St. John's Military Academy (Los Angeles) and Villanova Preparatory (Ojai, California). He would earn a Bachelor of Arts degree in Economics and Latin American affairs from Stanford University, CA. From 1951 until 1955, he served in the United States Navy as a lieutenant. He had crucial duties as an intelligence officer during the Korean War. When he ended his military service, Gavin started his acting career with Universal-International Pictures. He would end his acting with film credits noting he played roles in at least 20 films.

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