Liam started as an actor in Boston, performing in plays from Shakespeare to Stoppard. When then moved to Los Angeles, he discovered his talent for improv and sketch comedy. He joined the ACME Sketch Comedy Theater and quickly gained a spot in their main company. Liam began writing material and shooting videos in 2004 featuring his most famous persona, 'Kelly'. In addition to directing, writing, editing and performing his own material, he is also an experienced TV and film actor, and has been featured on the TV shows 8 Simple Rules, Gilmore Girls, and Alias, as well as the movie The Convent. In 2007 he became a series regular on the VH1 series I Hate My 30s.