Following his arrival in the U.S. in 1914, Dennis attended public schools in
Lowell, Massachusetts. After his father's death, he went to live with his sister in
Independence, Missouri, and where, as a waiter in his brother-in-law's restaurant, he reportedly had many opportunities to serve the future
POTUS (then a county judge),
Harry S. Truman. Dennis later spent two years at the
University of Illinois. Dennis, who began in films in 1947, was known for playing ethnic types (usually Greek) in films such as
Kiss Me Deadly and the
Humphrey Bogart film
Sirocco. Dennis, who spoke
Greek fluently, appeared in a number of television programs in the 1950s, 1960s, and 1970s including playing the parts of orderly Nick Kanavaras on the medical drama
Ben Casey and Uncle Constantine on the detective show
Kojak. Nick Dennis also played the role of Pablo Gonzales in
Tennessee Williams' play
A Streetcar Named Desire, as well as its subsequent film version in 1951. ==Personal life and death==