Who played trainee in gunsmoke?

In the Classic Television series "Gunsmoke," the character of trainee Deputy Marshal was portrayed by actor Ken Curtis, who played the role of Festus Hagen. Festus became a beloved character on the show, known for his comedic personality and loyalty to Marshal Matt Dillon, played by James Arness. Curtis joined the cast in the early 1960s and became a staple of the series until its conclusion in 1975.