Milburn's brother is Gunsmoke writer Charles Joseph Stone.
Milburn died in La Jolla, California.
Milburn was one of only two cast members that stayed for all 20 years of Gunsmoke.
Milburn has a star on the Hollywood Walk of Fame.
Milburn was inducted into the Hall of Great Western Performers of the National Cowboy and Western Heritage Museum in 1981.
Milburn was 5'8" tall.
Milburn was a nephew of Broadway personality Fred Stone.
Milburn was awarded an honorary doctorate from St. Mary of the Plains College in Dodge City, Kansas.
Milburn won an emmy in 1968 for his role as Gunsmoke's "Doc" Galen Adams.
One of Milburn''s nicknames was "Milly."