Liam Aiken
Liam Pdraic Aiken is an American actor. He has starred in films such as Stepmom and Good Boy , and played Klaus Baudelaire in Lemony Snickets A Series of Unfortunate Events , based on the series of books.
Aiken was born in New York City, New York, the only child of an Irishborn mother, Moya Aiken, and Bill Aiken, an MTV producer. Bill died of cancer in October 1992, at age 34, when Liam was two years old. He attended Dwight Englewood School, graduating in 2008. He then went on to major in film at New York University.
Source: Wikipedia