The 'Roar' singer will launch her 'The Prismatic World Tour' in Belfast on 7 May, before travelling to Newcastle, Nottingham, Birmingham, Glasgow, Manchester, Liverpool, Sheffield and London.
Katy's tour will be in support of her brand new album Prism, which features the smash single 'Roar' and new track 'Unconditionally'.
She announced the exciting news via Twitter on Monday morning (18 November), promising that further global tour dates will be revealed soon.
"DON'T WORRY - more GLOBAL tour dates coming soon! I can't wait to get closer to ALL of you than ever before! #THEPRISMATICWORLDTOUR," she added.
The dates so far are:
7 May: Belfast, Odyssey Arena
10 May: Newcastle Metro Radio Arena
11 May: Nottingham Capital FM Arena
13 May: Birmingham LG Arena
17 May: Glasgow The SSE Hydro
20 May: Manchester Phones 4 U Arena
21 May: Liverpool Echo Arena
23 May: Sheffield Motorpoint Arena
27 May: London 02 Arena
28 May: London 02 Arena
30 May: London 02 Arena
Tickets are on sale Friday, 22 November at 9am.
Katy will be joined on tour by Icona Pop, the Swedish duo responsible for the ridiculously catchy 'I Love It'. They're also due to join Miley Cyrus on her North American tour next year.
Watch Katy Perry's lyric video for 'Unconditionally' below: