The Professionals (1966)

Burton Stephen "Burt" Lancaster (November 2, 1913 – October 20, 1994) was an American film actor noted for his athletic physique and distinctive smile (which he called "The Grin"). Later he took roles that went against his initial "tough guy" image. In the late 1950s Lancaster abandoned his "all-American" image and came to be regarded as one of the best actors of his generation.

Lee Marvin (February 19, 1924 – August 29, 1987) was an American actor. Known for his distinctive voice and premature white hair, Marvin initially appeared in supporting roles, mostly villains, soldiers, and other hardboiled characters. A prominent television role was that of Detective Lieutenant Frank Ballinger in the crime series M Squad (1957–1960). Marvin is best remembered for his lead roles

Robert Bushnell Ryan (November 11, 1909 – July 11, 1973) was an American  actor who often played hardened cops and ruthless villains.