Liam Gallagher (born 30 July 1998) is the second youngest of the Gallagher children and is a minor character until series 5, when he takes a more central role in the main story lines. He apparently suffered from fits when he was smaller. He also used to wet the bed, though he claims that it was only to help put out the fires he had a likeness for starting. Throughout the series, Liam is practically raised by his older sisters, Fiona and Debbie, as Frank is lazy and Monica inept - when she is around. In later episodes, Liam shows considerable intelligence and resourcefulness like sister Debbie and is also an outspoken atheist.
In series 6, it is revealed that Liam is a talented musician, and also fluent in sign-language. Given his academic performance, the school determines Liam to be an exceptionally gifted pupil, which leads to him being awarded a special scholarship. During an interview at a local university, he initially fails to make a good impression due to nervousness. But that changed when his father Frank attempts to steal the "Joy of Sex" manual from the university library; Liam plucks up the courage to tell the panel of education directors why he deserves the scholarship in an impassioned speech.
In series 3, the then five year old Liam was almost expelled from his RC Primary School when he openly denounced religion during a Christmas nativity play that was held by the school. Debbie learned of this development on New Years day 2006 when meeting with Liam's headteacher and a local parish priest. Debbie tried to warn Frank of the situation and the expected visit from the school, but to no avail. On the day of the school visit, and when it was apparent that Frank was not going to help, Debbie had to take matters into her own hands. She shaved Liam's head, and told the school administrators that her little brother had Cancer. Unfortunately, the rumour had gotten out of hand, and spread out across the Chatsworth community, until a fund-raiser for "Liam Day" was set up by Jez Dawson, who was at the time, landlady of "The Jockey".
Liam is now one of the few people in Chatsworth who is aware of Mickey Maguire's homosexuality. He sarcastically tells Mickey that he figured it out through his "amazing powers of deduction", despite Mickey's stereotypically gay mannerisms and and aesthetic preferences.