The Script have been confirmed as the second headliner for Tennent's Vital when it returns to Belfast in August.
The Irish pop rock band, who have sold 20 million records, will be supported by Dublin rockers Kodaline, British electronic group Clean Bandit and DJ Annie Mac at the 2015 Boucher Road festival on Sunday, August 30.
Their appearance follows previous gigs by some of the world's biggest bands, including Northern Ireland's own Snow Patrol, Kasabian, The Killers, Kaiser Chiefs, Kings of Leon, Franz Ferdinand, The White Stripes, Ash, The Streets and Primal Scream.
Frontman Danny O’Donoghue helped The Script soar into the mainstream after two seasons judging on The Voice on BBC1.
The trio - onetime studio whizzes Danny, Mark Sheehan and Glen Power, formed in 2001 but only released their debut album in 2008, featuring the hit songs The Man Who Can't Be Moved and Breakeven (Falling to Pieces).
However it was their 2012 worldwide smash Hall Of Fame - a collaboration with Danny’s Voice co-judge Will.I.Am - that propelled them to the forefront of the charts in America.
They played three nights at Belfast's Odyssey Arena in 2013.
Scottish chart-topping DJ Calvin Harris will headline the Saturday night gig on Saturday, August 29 - supported by Ellie Goulding, John Newman, Disciples and Burn.
Tennent's Vital was first held in Belfast in 2002, near Botanic Gardens before moving to Ormeau Park in 2007.
Northern Ireland band Snow Patrol made a home-coming gig to a crowd of over 40,000 in their native Bangor when the festival was held there in 2010.
Traditionally a two-day event, last year the organisers laid on a surprise third date at its most recent home, Boucher playing fields, to bring Avicii to Belfast.
It has since been given permission by Belfast City Council to hold up to four concerts.