Walter Slezak (May 3, 1902 - April 21, 1983) was an Austrian actor and son of famed opera star (Leo Slezak ).

A hulking figure at 6'6", Slezak usually played a villain or thug. He worked steadily and appeared in over 100 films including Once Upon a Honeymoon (1942), Lifeboat, (1944) The Princess and the Pirate (1944), Sinbad theSailor (1947), The Miracle (1959), and Treasure Island (1972). He won a Tony Award in 1955 for his role in the Broadway production of "Fanny ". Apparently despondent over his continuing illnesses, he committed suicide at age 80. He was survived by three children, including daughter Erika, who has risen to fame on the soap opera, One Life to Live.