**Lou Antonio (1934)** is an American actor and director whose film career as a performer was established in the 1960s. Known for his intense and realistic presence, Antonio was often cast in roles as tough, rebellious characters or those with a tormented side.

Among his most notable performances are Kosta in Elia Kazan's **America America** (1963) and the role of inmate Nick in **Cool Hand Luke** (1967). He demonstrated greater versatility in the lead role of Charlie in **The Sterile Cuckoo** (1969), a drama in which he starred alongside Liza Minnelli, showing a more vulnerable and sensitive side.

Although he went on to have a prolific career as a television and film director, his acting performances remain important for their authenticity and for bringing to life characters who were often marginalized but rich in nuance.