Liam was in Manchester for a special premiere of the Mat Whitecross film, which is released in cinemas on October 7.
Liam Gallagher was back in Manchester to celebrate the release of the new Oasis rockumentary Supersonic - but he couldn't resist taking the opportunity to have a swipe at his big brother.
In a post-screening Q&A that was beamed live to over 300 UK cinemas, the younger Gallagher kept the fires of sibling rivalry burning when he was asked why Noel wasn't at the Manchester screening of the new Mat Whitecross movie.
He replied: "He's probably in his big house, eating tofu and having a face peel. That's what posh people do."
On fine four-letter form, Liam answered questions about his favourite memories of the early years of Oasis and whether the film - a collection of amateur home movies, concert footage, archive interviews and new chats with the band - had jogged his memory.
Liam, 44, said that he was surprised the director had managed to turn up so much footage because "I don't really like having cameras" around, and joked that his friends must have been secretly shooting it "under cover".
"They must have been ****ing sneaking it," he said. "When anyone whipped a camera out in those days I shut up shop."
Supersonic focuses on the band's early years, from the moment Noel joined Liam's band up to their record breaking gigs at Knebworth in 1996, when they became the biggest rock band in the world.
But it also touches on more challenging personal moments for the boys, including their difficult relationship with their father, Thomas, and the reasons for the tensions between the brothers.
Whitecross said he had deliberately chosen this period because the first few years for any new band are always the most 'interesting and unique'. He also praised the brothers - and especially their mum Peggy Gallagher - for their generous contributions to the film.
Liam's bandmate and the group's rhythm guitarist Paul "Bonehead" Arthurs was also in the audience and was eventually beckoned on stage by Liam to join in the Q&A. The pair shared a hug before bantering with each other about their feelings about the film and time in Oasis.
Liam teased Bonehead about his outfit, asking him if he'd been to expensive Northern Quarter mens fashion shop Oi Polloi. And he even tried to help a fan chose a name for her new baby girl, answering: "Elsa, how about that?", then changing his mind to Noleen.
Inevitably, Liam was also invited to answer questions about what he was up to next. His solo album "will be out when it's out", he said, and at one point he remarked, "F*** Oasis" - which might just confirm he has no intention of restarting a band with the brother he repeatedly calls 'the potato' on social media.