- Inspired to act by his mother, who worked in a community-theater props department.
- Joined a children's summer theater at age 9.
- Made film debut in director Blake Edwards' 1986 movie That's Life!
- Best known for his role as Theodore 'T-Bag' Bagwell on Prison Break.
- Ben Knepper — Son
- Pat Deck — Mother
- Tori Knepper — Ex-wife
- Don Knepper — Father
- Attended Northwestern University, Evanston, Illinois, United States
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