An American actor, he gained widespread recognition for his role as Jack Shephard on the hit TV series "Lost," which aired from 2004 to 2010. Born in 1966 in Abington, Pennsylvania, he grew up in Wyoming and later attended Columbia University, where he earned a degree in economics. He began his acting career in the early 1990s, with notable roles in "Party of Five" and films like "We Are Marshall" and "World War Z." Known for his intense performances, he retired from acting in the mid-2010s.