The singer - whose older sibling quit the super-group last August after tensions and feuding between the pair became intolerable - believes his brother is completely over-hyped.
Discussing who he thought was the most overrated man in history, Liam told Esquire magazine: "Has to be Noel Gallagher."
Liam, 37, is currently working on new material with his ex-Oasis bandmates Gem Archer, Andy Bell and Chris Sharrock, while 42-year-old Noel - who wrote the majority of Oasis' biggest hits - is preparing to launch a solo career.
Although they can no longer work together, Liam believes Oasis were successful because they just concentrated on making great music.
He explained: "What's the secret to my success? Taking the music 100 per cent seriously but the rest of it having a laugh. Getting everyone at it. There's no point in doing it any other way. We weren't built on a career plan. All these kids these days are so obsessed with their careers. We just f***ing did it and it happened, and if it didn't f***ing happen, then it didn't."
Source: www.femalefirst.co.uk