Robert Redford's celebrated career in Hollywood has seen him cross paths with the western genre occasionally, and an underrated '70s gem is actually his best. Redford was already a known quantity in movies by the time he co-starred alongside Paul Newman in 1969's Butch Cassidy and the Sundance Kid, but it was that film that helped propel him into leading-man territory. Redford would continue to turn in award-winning performances across the next few decades, and would even pop up occasionally to star in a hit or two well into the new millennium.