- Made Broadway debut in A Doll's House at age 6.
- Movie debut was in the 1997 comedy-drama Henry Fool.
- In 1998, landed his first TV role on the NBC drama Law & Order.
- Received his first Young Artist Award for his work in Stepmom (1998).
- Passed on the main role in M. Night Shyamalan's The Sixth Sense; his mom didn't like the gloomy theme of the movie. He was also a strong candidate for the lead role in the Harry Potter series but didn't get it because he wasn't English.
- Cast as Milo in the CBS 2011 drama A Gifted Man.
- 2005, Critics' Choice Awards — Best Young Actor: Nominee
- Bill Aiken — Father
- Moya Aiken — Mother
- New York University, Tisch School of the Arts, New York, New York, United States
Season 2, Episode 2
- Birth Name: Liam Padraic Aiken
- Birth Place: New York, New York, United States
- Birthday: January 7, 1990, Capricorn
- Profession: Actor