Great Cast!
Besides the obvious of Brando you have:
Lee Marvin-Early movie for future star of such flicks as "The Dirty Dozen" and "Cat Ballou"
Jay C. Flippen-Great character actor of over 100 films including "Oklahoma" and dozens of westerns.
Will Wright-Another face you'd recognize from nearly 200 movies...always played the Old Grouch.
Richard Farnsworth-Former stunt man and oscar nominee for "Comes a Horseman" and "The Straight Story"
Alvy Moore-The geeky farm agent Hank Kimball on "Green Acres."
Jerry Paris-Actor, Director and Creator of numerous shows including "Happy Days"
Gil Stratton-Best known for his role as "Cookie" in "Stalag 17" and later a sports caster
John Doucette-Gravelly-voiced character actor whom you've seen in a million movies and tv shows.
Robert Keith-father of Brian Keith; must have played a 100 sheriffs over the years.
Ray Teal-played the sheriff on Bonanza as well as numerous movies and tv shows.
Many others too numerous to mention but these are the most well-known.