The O2, the world’s most popular live entertainment, leisure and retail destination, owned and operated by AEG International, has announced that alt-J will perform at the venue as part of its 20th birthday celebrations, taking place throughout summer 2027. The Mercury Prize-winning British band will bring its THEN AGAIN TOUR 2027 to the iconic London venue on Wednesday 14 July 2027, marking a decade since its headline performance at The O2 in 2017.
One of the most successful British bands of the millennium, alt-J have sold more than two million albums and amassed more than two billion streams. Their Mercury Prize and Ivor Novello Award-winning debut, An Awesome Wave, was followed by UK number one album This Is All Yours, while 2017’s RELAXER became the band’s second album to be nominated for the Mercury Prize.
alt-J join a growing line-up of international artists and performers celebrating two decades of live entertainment at the iconic London venue. Confirmed 20th birthday artists include:
Maisie Peters, Saturday 8 May 2027
Shreya Ghoshal, Friday 4 June 2027
David Guetta, Saturday 5 June 2027
SOMBR, 21, 22, 24, 25 and 29 June 2027
Brad Paisley, Saturday 26 June 2027
Billie Jean King and John McEnroe, Sunday 27 June 2027
Santana, Wednesday 30 June 2027
Kings of Leon, Friday 2 July 2027
Jack Johnson, Sunday 4 July 2027
Don Omar, Monday 5 July 2027
Pet Shop Boys, 9-10 July
alt-J, Wednesday 14 July
Jamiroquai, 15, 16 and 19 July 2027
Jorja Smith, Saturday 17 July 2027
Priority Tickets will be available exclusively to O2 and Virgin Media broadband customers via the Priority app from 10.00am on Wednesday 18 November 2026.
Tickets will go on general sale at 10.00am on Friday 20 November 2026 via The O2 website.
The band have today confirmed four UK dates including headline shows Live at The Piece Hall, Halifax, on Saturday July 17 and DEPOT Live at Cardiff Castle on Sunday July 18. They will also visit Manchester’s Castlefield Bowl and The O2, London.
Alt-J – Then Again Tour 2027 Dates
02 July – Manchester, Castlefield Bowl
14 July – London, The O2
17 July – Halifax, The Piece Hall
18 July – Cardiff, Cardiff Castle
Tickets go on general sale at 10am Friday November 20 via ticketmaster.co.uk
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