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Birth name Kazimierz A. SiemaszkoNationality USABirth 17 march 1961
(59 years) at Chicago (USA
Kazimierz A. "Casey" Siemaszko (born March 17, 1961) is an American actor. His best known film roles are Back to the Future and Back to the Future Part II as 3-D, Stand By Me as Billy Tessio, Young Guns as Charlie Bowdre, and as Curley in Of Mice and Men.
Siemaszko was born in Chicago, Illinois. His father, Konstanty, was a Polish-born Roman Catholic who was a fighter in the Polish Underground during World War II, and who survived the Sachsenhausen concentration camp. His mother, Collette McAllister, was English. Siemaszko narrated the 1998 feature, The Polish-Americans. He is a graduate of the Goodman School of Drama at DePaul University in Chicago, as is his sister, actress Nina Siemaszko. He also has a brother, Corky Siemaszko, a reporter/writer for the New York Daily News.