Hopalong Cassidy was the western character played by William Lawrence Boyd (1895-1972)in 66 films between 1935 and 1948,
the longest running series of any fictional movie character.

William Boyd also made 52 half-hour television programs and 104 half-hour radio episodes that were broadcast in the early 1950s. He was one of the top box office western stars from the late 1930s to the mid-1940s. William Boyd didn't just play the part, he LIVED the part.

He was loved by millions of adoring fans and was known by just one name: "Hoppy."

There were many actors who played Hoppy's sidekicks, including Britt Wood, Brad King, Jay Kirby, George Reeves (later SUPERMAN on television), Jimmy Rogers (son of Will Rogers), and Rand Brooks.

There were also his two main comic sidekicks:
George Hayes (as Windy) and Andy Clyde (as California).

Robert Mitchum also began his acting career in a Hopalong Cassidy western: BAR 20 (1943).

The first time a trio of cowboys received top billing was in Hopalong Cassidy westerns.

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