The band, whose debut album Definitely Maybe was released 30 years ago, split backstage before a 2009 show when lead guitarist and main songwriter Noel Gallagher said he could no longer work with his brother Liam, the band’s frontman.

“This is it, this is happening,” the band said on X, announcing tickets would go on sale on Saturday. The first show will be held in Cardiff on July 4 next year.

Oasis will play a total of 14 gigs in Cardiff, Manchester, London, Edinburgh and Dublin.

The tour will mark the 30th anniversary of second album (What’s the Story) Morning Glory?, which included the singles Don’t Look Back in Anger and Wonderwall.

Confirming the Oasis Live 25 tour, Liam posted: “The guns have fallen silent. The stars have aligned. The great wait is over. Come see. It will not be televised.”

Liam clarified on X, formerly Twitter, that the UK and Ireland leg of the tour is “the band’s exclusive European appearances”.

10 Oasis songs you should know

Despite speculation that a Glastonbury slot could be in the works, the Worthy Farm event will not see Oasis on the bill, PA news agency understands. The band have previously played the festival in 1995 and 2004.

A black and white image of the two brothers, both in dark jackets, was also released as part of the announcement on Tuesday.

It has not been announced who will be performing with the Gallaghers as part of Oasis.

Tracks from the first recording session for Oasis’s 1994 debut Definitely Maybe will be released on Friday, a day after the record marks 30 years since its release.

Oasis split in 2009 after many years of infighting, with Noel officially leaving the band just before a performance at a festival near Paris. Even before the dissolution, the brothers had long had an antagonistic relationship and reportedly did not speak to each other for years after the break-up.

“People will write and say what they like, but I simply could not go on working with Liam a day longer,” Noel, the band’s guitarist and songwriter, said at the time.

Speculation about Oasis’ reunion began on Monday after the brothers announced on their respective Instagram accounts that they would make a major announcement.

Rumours were also fuelled on Sunday when Liam dedicated the Oasis track Half The World Away to his older brother during his performance at the Reading music festival.

DJ Kevin McManus suggested that the demand for tickets will outstrip Swift’s recent gigs in the UK.

He told ITV: “I think people forget, but the two Knebworth shows they did, almost four per cent of the population tried to get tickets.

“They sold out 250,000 tickets, but it was a ridiculous amount of people who tried to buy tickets, they were that huge.

“But this, because people have been talking about it for the past decade, it’s going to be even bigger. I think everybody is going to try and get a ticket.

“Taylor Swift was obviously the big deal this summer, I think it’s going to absolutely dwarf that, just because it’s them and there’s that talk.

“And there’s always going to be that ‘are they going to do it? Are they going to fall out before the first show, are they going to fall out after five shows? Will they do the rest?’

“There’s always going to be that air of jeopardy.”

Professor Jonathan Shalit, the chairman of talent agency InterTalent, recently claimed that Oasis could make “over 400 million pounds ($A780 million)” from their reunion.

“With tickets, sponsorship, merchandise and filming, I would predict an income for Noel and Liam of over 50 million pounds ($A97 million) each,” he said.

“This is a tour that could easily gross over 400 million pounds ($A780 million).”

– AAP