Katy Perry has announced Icona Pop will be joining her on tour.

The "Roar" singer took to Twitter yesterday morning to release the dates of her Prismatic World Tour and confirmed the Swedish duo as her support act. The "I Love It" hit-makers will feature as special guests on the UK leg of Katy's worldwide tour in support of her latest album Prism, which landed the number ones in both the UK and US charts.

"#THEPRISMATICWORLDTOUR is coming May 2014! First stop: UK! Tix on sale FRIDAY, 11/22 at http://www.ticketmaster.co.uk. I'm bringing my friends @iconapop to Belfast, Newcastle, Nottingham, Birmingham, Glasgow, Manchester, Liverpool, Sheffield and LONDON!" she wrote.

The eagerly-awaited tour will open next year with a string of gigs in Belfast's Odyssey Arena on May 7, and will finish with a three-night stay at London's O2 Arena on May 30. Whilst tickets for the UK leg of Katy's Prismatic World Tour tour go on sale from 9 am Friday, she has assured fans that the rest of her worldwide tour dates will be released shortly. "DON'T WORRY - more GLOBAL tour dates coming soon! I can't wait to get closer to ALL of you than ever before! #THEPRISMATICWORLDTOUR [sic]," she added.