Marian Kociniak was born on January 11, 1936 in Warsaw, Mazowieckie, Poland. He was an actor, known for Television Theater (1953), Pan Tadeusz: The Last Foray in Lithuania (1999) and How I Unleashed World War II (1970). He was married to Grazyna Kociniak. He died on March 17, 2016 in Warsaw.