Hop-Along Cassidy (reissued as Hopalong Cassidy Enters) is a 1935 American Western film that features 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 he decided to take the role of Hop-Along instead.