Vault / John O'Hara John O'Hara Acting 2 credits Share X f r w ⧉ Copied! Biography Biography coming soon. Ask the Vault Ask anything about John O'Hara. Ask What are they best known for?What kind of roles do they play?What should I watch them in? Known for Lostas Jack Shephard Film 100 Girlsas Matthew - 10 Years Old Career timeline 2004Lost 2000100 Girls Full filmography Lost (2004) as Jack Shephard 100 Girls (2000) as Matthew - 10 Years Old