- Liam took a piece of wallpaper from the set of Asoue as a souvineir.
- Liam's favorite bands are Rage Against the Machine, Green Day, Slipknot, and Rufus Wainright.
- Liam's hobbies are skateboarding, acting, watching TV, seeing movies, skiing, surfing, playing guitar, and reading.
- Liam's first dog, an Italian Greyhound, was named Kes.
- Liam is the lead guitarist for the band Saint Levi.
- Liam plays the drums.
- Liam attends Dwight-Englewood School, from which he will graduate in 2008.
- Liam's first major film role was playing Susan Sarandon's young son in Stepmom in 1998.
- While out promoting the movie Lemony Snicket's: A Series of Unfortunate Events a movie in which he plays a child who is orphaned when his parents are killed in a fire, ironically his house burned down.
- Liam appeared as Bobby Helmer on the Broadway play A Doll's House.
- Liam attended the 76th annual Academy Awards with his good friend Miles Guthrie Robbins.
- He's a fan of punk music, and aspires to play the guitar like Rage Against the Machine's Tom Morello.
- Instead of getting tutored separately from his class, Liam's on-set tutor actually brings him his school homework.
- Liam turned down the role in The Sixth Sense, which then went to Haley Joel Osment.
- His father, Bill Aiken, was a producer for MTV and Nickleodeon television programs who died of cancer when Liam was 2 1/2 years old.
- Liam's first job in acting was starring in a Ford Windstar commercial.
- Liam's favorite restaurant is McDonald's. His favorite movies are The Sting, and The Italian Job. His favorite Unfortunate Events book is Slippery Soap.
- Liam owns a minature italian greyhound named Kes.
- Liam is one of many teen hosts for the up-coming "Walk For Kids" fundraiser.
- Liam's favorite baseball team is the New York Yankees.
- Liam's favorite color is orange.
- Liam admits that he and his co-star fought a lot on the set of A Series of Unfortunate Events and ironically, they played brother and sister.
- Liam was originally going to play Harry Potter but J.K. Rowling had an all british cast rule and Liam is not British.
- Liam enjoys doing magic tricks.
- Liam is 5'10" tall.
- Liam currently lives in New Jersey with his mom.
- Liam: Shortly after my dad died, my mom figured that if I could do a few commercials, I'd get a college fund.
- Liam: I've never really tried to copy anyone, I like to have my own style.
- Liam: I hang out with the 'nerdy' people. They have a different sense of humor than most kids.
- Liam: I tried ostrich once, but I didn't like that. We found Pringles there, that was good.
- Liam: I kinda like the less-cheery stuff, so it was easy to get into the mindset of 'Lemony'. I'm a quirky, off-the-beaten-track kind of guy.
- Liam: I remember somebody said, 'You yawned onstage. Nobody yawns.' I don't know why, but I was just never worried.
- Liam: I like comedies and action type films. I really do like comedies actually. I like to have a good time.
- Liam: (Wants to start a band) But everybody at my new school's already got their own bands.
- Liam: (On not getting the role in Harry Potter) I think I had this feeling that it wouldn't work out, but it was fine. I would have just been Harry Potter from then on.
