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

The 'Roar' singer took to Twitter this morning (18.11.13) 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.

Katy wrote:'' #THEPRISMATICWORLDTOUR is coming May 2014! First stop: UK! Tix on sale FRIDAY, 11/22 at http://www.ticketmaster.co.uk (sic)''

''I'm bringing my friends @iconapop to Belfast, Newcastle, Nottingham, Birmingham, Glasgow, Manchester, Liverpool, Sheffield and LONDON!''

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 (22.11.13), she has assured fans that the rest of her worldwide tour dates will be released shortly.

The 29-year-old beauty added: ''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)''.

The full UK tour dates are as follows:

May 7 - Belfast Odyssey Arena

May 10 - Newcastle Metro Arena

May 11 - Nottingham Capital FM Arena

May 13 - Birmingham LG Arena

May 17 - Glasgow, The SSE Hydro

May 20 - Manchester Phones 4U Arena

May 21 - Liverpool Echo Arena

May 23 - Sheffield Motorpoint Arena

May 27, 28, 30 - London O2 Arena