Responding to a Twitter user asking if classic Oasis hits will feature in the upcoming film, Liam replied: "No oasis songs as the angry squirt has blocked them he also blocked the Oasis I sang for Taylor Hawkins tribute he’s a horrible little man."
Knebworth 22 will show Gallagher's return to the site of Oasis' famous gig from 1996 which saw them play in front of a crowd of 250,000 people.
Responding to another tweet that said Noel had recently praised Liam in an interview, the former frontman said: “What he says and does are 2 different things he’s a sad little dwarf.”
Gallagher later tweeted: “You can stop us using the songs but you can’t erase our memories shame on you Noel Gallagher.”
Knebworth 22 is set to be released in UK cinemas on 17 November. In a statement regarding the film, Liam said: “I’m still in shock that I got to play Knebworth two nights, 26 years after I played it with Oasis. To have played to multiple generations at the same venue so many years apart was beyond biblical. I’m so glad that we documented it.”
Since Oasis split up in 2009 after an altercation between the brothers, there have always been rumours of a reunion at an event such as Glastonbury.
In an interview earlier this week, Noel said there was "no point" in the band getting back together as they still sell so many records and remain popular on streaming services.
The two are thought to have not spoken for a decade despite frequently attending the same Manchester City football matches.
Watch below: Liam Gallagher has 'half a bottle of brandy' before shows.