- Earned his first film role in M. Night Shyamalan's The Village (2004), which was filmed near McDermott's Pennsylvania home.
- Moved to Los Angles in 2006 at age 16 to pursue an acting career.
- Worked with his cousin, child actor James Reilly, on the independent movie Frozen River (2008). The two actors played brothers in the film.
- Earned a Spirit Award nomination for Best Supporting Actor for his work in Frozen River.
- 2009, Independent Spirit Awards — Best Supporting Male: Nominee
- Charlie — Father
- Erin — Sister
- Grace — Sister
- Barb — Mother
- James Reilly — Cousin
Season 1, Episode 17
- Birth Place: West Chester, Pennsylvania, United States
- Birthday: April 6, 1990, Aries
- Profession: Actor