A round-faced, slightly pudgy former juvenile lead who moved character roles in his 20s and 30s, Casey Siemaszko was born and raised in a Polish ethnic community in Chicago, IL. His father, a Holocaust survivor, ran a dance troupe and Casey (born Kazimierz) debuted with them at age five. His first paying job, however, was as an extra in the Stuttgart Ballet production of "The Taming of the Shrew". Siemaszko studied at the Goodman Theater School, where he acted in several stage productions. After debuting in "Class" (1983), he went on to appear as Jerry O'Connell's older brother in "Stand By
