Liam O'Neil is a Canadian musician and music producer, best known as the keyboardist and percussionist for Montreal-based band the Stills. He met the group's primary songwriter, Dave Hamelin, at school through a mutual friend. In 1996, the pair formed a ska band, in which O'Neil played saxophone. He later spent 18 months away from Montreal while he played in a jazz trio on a cruise ship, but he stayed in contact with the members of the Stills. After initially touring with the band, he became a full-time member when his bandmates heard him play a half-hour piano solo in a hotel bar. His first album with the band was Without Feathers. A talented multi-instrumentalist, he played piano, organ, saxophone, and tambourine on the record, as well as providing backing vocals on a number of tracks.