Sikora was born in Chicago, Illinois, to mother Barbara and father Albin, one of three boys, and lived in the Jefferson Park and Norwood Park neighborhoods. He is of Polish and Dutch descent. Sikora graduated from Notre Dame College Prep in 1994. He studied acting at Columbia College Chicago, where he earned his MA in theater.

出生于伊利诺伊州芝加哥，母亲芭芭拉和父亲阿尔宾是三个男孩之一，住在杰斐逊公园和诺伍德公园附近。他有波兰和荷兰血统。Sikora 于 1994 年毕业于圣母大学预科。他在芝加哥哥伦比亚学院学习表演，在那里他获得了戏剧硕士学位。