Hop-Along Cassidy is a 1935 American western film, featuring the character Hop-Along Cassidy created by writer Clarence E. Mulford. This is the first of 66 Hopalong Cassidy films produced between 1935 and 1948 and all starring William Boyd in the title role. William Boyd was originally offered the role of Buck Peters, the ranch foreman, but decided to take the role of Hop-Along instead.