Gallagher, who famously feuded with the band during the 1990s, said he had asked Blur to play but was told they had been put "to bed".
Announcing the line-up for next March's charity gigs, which also features Primal Scream, Kasabian, Ryan Adams and Rizzle Kicks on the bill, Gallagher said: "I was on tour with Graham and asked him if Blur would do it but he said they'd kind of put Blur to bed.
"They decided that just the two of them could do it. It's going to be great. And 10 years ago, who'd have thought it."
The singer, who now performs as solo project, Noel Gallagher's High Flying Birds, even admitted he liked playing Blur's Tender at home.
Labrinth and Beth Orton will also play, and comedians Russell Brand and Noel Fielding will perform stand up at the Royal Albert Hall gigs.
Gallagher, who has taken over as the main curator of the shows from The Who frontman Roger Daltrey after 11 years, promised to keep the fans happy by playing Oasis songs.
Asked if he would perform with Oasis if he was asked to organise the project in 2014, Gallagher said: "Let's wait to be asked first."
The Mancunian admitted he was still a big fan of the X Factor. He said: "I want James Arthur to win.
"I wouldn't mind the Scouser (Christopher Maloney) to win as it would be great to watch him having a nervous breakdown eventually in about five years.
"I do like the X Factor, for my sins."
Asked if he was happy at the news that Prince William and Kate Middleton are expecting a child, he said: "Well they're not the first people in the country to have a child, are they. I've got three."