Gem Archer believes Liam Gallagher was "suppressed" by his brother Noel.
The guitarist - who now performs with the singer in Beady Eye - believes his former Oasis bandmate restricted his sibling, but thinks it stopped the 'Bring the Light' vocalist from going completely off the rails.
He said: "Did Noel suppress Liam? Course he has. Not all his life. But look, in some ways, with Noel, the best thing has been suppressing him. Because Liam could have really f***ed his own life up.
"It's so not simple, they're both the real deal. I ended up in the middle of two of the biggest forces in rock 'n' roll. So I do my best. Liam ain't a monster. And neither is Noel."
Liam's Beady Eye bandmates - who were also in Oasis and include Chris Sharrock and Andy Bell -believes Noel's departure has made the singer more relaxed and fun to be around.
Gem explained to Q magazine: "What would happen if Noel was here? Well, nobody is assuming the Noel role of, 'You shouldn't be drinking tonight' so Liam would probably still be out at midnight, just to prove a point."
Chris added: "Hence Liam's always in a good mood. It's like Elvis walking around."