Florence Welch and co will also be joined by Of Monsters and Men
Welch and band will tour the US and Canada during May and June, kicking things off in Houston, Texas on May 17, before finishing up in Chicago on June 12.
Canadian artist Grimes will support Welch at dates in Houston, Dallas, Austin, Gulf Shores (Alabama), Kansas, Denver and Saint Paul.
Florence And The Machine will be joined by Icelandic fivepiece Of Monsters And Men for the remainder of the stint.
Watch a trailer video for the tour beneath.
Florence And The Machine released latest album ‘How Big, How Blue, How Beautiful’ in May 2015. It reached Number One in both the UK and US.