|The 10th Annual Critics' Choice Awards||2005 2004 - 2005||Actor||n/a||20057|
|Good Boy!||2003||Actor||Owen Baker||20037|
|Ned Rifle||2015||Actor||Ned Rifle||20157|
|A Gifted Man||2011 2011||Actor||Milo||20117|
|Law & Order: Criminal Intent||2009 2002, 2009||Actor||Robbie Bishop||20097|
|Law & Order||2007 1998, 2007||Actor||Jack Ericson||20077|
|Girls Against Boys||2013||Actor||Tyler||20137|
|Electrick Children||2013||Actor||Mr. Will||20137|
|I Dreamed of Africa||2000||Actor||(Age 7)||20007|
|Lemony Snicket's A Series of Unfortunate Events||2004||Actor||Klaus Baudelaire||20047|
|Fay Grim||2007||Actor||Ned Grim||20077|
|Mad Men||2013 2013||Actor||Rolo||20137|
|Road to Perdition||2002||Actor||Peter Sullivan||20027|
|The Rising Place||2002||Actor||Emmett--Virginia's Son||20027|
|The Killer Inside Me||2010||Actor||Johnnie Pappas||20107|
|The Object of My Affection||1998||Actor||Nathan||19987|
|TV debut on an episode of the top-rated series "Law & Order"|
|Played Susan Sarandon and Ed Harris' mischievous, scene-stealing son in the family comedy/drama "Stepmom"|
|Acted opposite Janet McTeer in the Broadway revival of Ibsen's "A Doll's House"|
|Had featured role as Kim Basinger's son in the adventure drama "I Dreamed of Africa"|
|Starred as orphan Klaus Baudelaire in "Lemony Snicket's A Series of Unfortunate Events" an adaptation of Daniel Handler's beloved children's-book series|
|Feature film acting debut, played Parker Posey's son in "Henry Fool"|
|Appeared in "Sweet November", a remake of the 1968 Sandy Dennis/Anthony Newley film starring Keanu Reeves and Charlize Theron|
|Cast as Tom Hanks' son in "Road to Perdition" directed by Sam Mendes|
|Had minor role as Paul Rudd's student in the romantic comedy "The Object of My Affection"|
|Co-starred in the World War II drama "The Rising Place" (lensed 1999)|
|William Aiken||Father||worked at MTV; died of cancer in October 1992 at age 34|
|"The moment Liam stepped in the room, I knew our search was over. Liam was adorable. Mischievous. Funny. Smart. And, most importantly, real. His reading of the film's final scene was heartbreaking. We had our Ben." --Chris Columbus, director "Stepmom".|
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