While Arness is best known for 'Gunsmoke', the star landed his first role in 1947, playing "Peter" in the film 'The Farmer's Daughter'. He then starred in the 1949 and 1952 movies 'Battleground' (nominated for an Oscar for Best Picture), and 'The Girl In White', as "Garby" and "Matt" respectively. His TV debut took place in 1950 as "Deputy Bud Titus" in 'The Lone Ranger'. From 1977 to 1979 he played "Zeb" in 'How The West Was Won', which is one of his most notable career highlights.
His fantastic acting skills made Arness earn three Emmy Award nominations,, all of them for his appearance in 'Gunsmoke': Best Continuing Performance by an Actor in a Dramatic Series in 1957, Best Continuing Performance by an Actor in a Leading Role in a Dramatic or Comedy Series in 1958, and Best Actor in a Leading Role (Continuing Character) in a Dramatic Series in 1959.