The Chase & Status collaborator will embark on a 10-date autumn tour in 2017.
Grennan will perform some of his biggest shows to date in cities across the UK.
He has recently released the video to his latest track "Praying" of his EP "Release the Brakes" which sees Grennan's soulful and raspy vocals take centre stage.
On the song he says: "The inspiration came from being on a pathway without direction but knowing that there's a better path to be on and waiting on the brighter days to come".
Meanwhile he will also play a sold out show at Union Chapel in London on April 20 as well as festival sets at the likes of Reading and Leeds, Latitude and Dot to Dot.
Tickets for his London KOKO show are priced at £16.50, they go on sale at 10am on Friday March 24 and you can get them from Ticketmaster here .
What are the full UK tour dates?
Tuesday September 26 - Nottingham, Rescue Rooms
Wednesday September 27 - London, KOKO
Thursday September 28 - Bristol, Thekla
Friday September 29 - Cardiff, The Globe
Saturday September 30 - Brighton, Old Market
Sunday October 1 - Bournemouth, Old Fire Station
Tuesday October 3 - Newcastle, Riverside
Wednesday October 4 - Liverpool, Leaf
Thursday October 5 - Manchester, Sound Control
Friday October 6 - Birmingham, 02 Institute 3
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