William John Paul "Liam" Gallagher (born 21 September 1972) is an English musician, singer, and songwriter. He is best known as the original founder and the lead vocalist of the rock band Oasis and has recently announced the split of the band Beady Eye with ex-Oasis members. Gallagher's erratic behaviour, distinctive singing style, and abrasive attitude have been the subject of commentary in the press. He remains one of the most recognisable figures in modern British music.

Although his elder brother Noel Gallagher wrote the majority of Oasis's songs, Liam has penned the singles "Songbird" and "I'm Outta Time", along with a string of album tracks and B-sides. Noel departed in 2009 and formed Noel Gallagher's High Flying Birds, while Liam continued with the members of Oasis under the Beady Eye name until they disbanded in 2014.