In the late 1980s, McGuigan started a band called The Rain with Paul "Bonehead" Arthurs on guitar, Chris Hutton on lead vocals, and Tony McCarroll on drums.

Liam's brother Noel then joined the band as a guitarist and the primary songwriter, at which point they changed their name to Oasis.

Despite a rumour that McGuigan did not play bass on Definitely Maybe and that his and Bonehead's parts were replaced by Noel on the first two albums, this has been denied by the band's producer Owen Morris.

[3] McGuigan left Oasis in 1999 and was replaced by then-former Ride frontman and guitarist Andy Bell as bassist.

"[6] An avid sports fan, McGuigan especially loves football and is a lifelong supporter of Manchester City FC.