The performance, set to take place on the Pyramid Stage, would mark 25 years since their first time gracing the stage at Worthy Farm.
While their last performance as a band was in 2016, Martin attended the event in 2017 and joined Kylie Minogue and Stormy on stage during their sets in 2019.
Coldplay performed a set in 2021, featuring on Glastonbury’s Live At Worthy Farm livestream, after the festival was cancelled on account of the Covid-19 pandemic and ensuing lockdown restrictions.
The band are also due to release a new album called Moon Music, Martin hinting it will be out “early next year”.
Chatting about the upcoming record and its similarities to the band’s last LP, Martin said: “I wouldn’t say it’s a sequel, but it’s related. It’s its own thing, but it will be part of this same tour. It’s like a cousin.
“We take a studio with us on tour. That’s the amazing thing about making records now is you can make them everywhere. I always go to the studio on days off. That’s my hobby.”
When asked if there were any collaborations on the horizon, he replied: “I don’t know. That’s still to be decided.
“I think we’re approaching collaborations slightly differently this time. But I’m really enjoying working on it.”
He also addressed a rumour that Coldplay will only release three more albums before calling it quits.
While in Italy, he said: “I just have a strong feeling in my heart that we are supposed to do 12 projects, and that feels really right.
“But after that, we’d still like to do shows and tours. I think 12 albums is a lot.”