Welch, who also pens the band's songs, will collaborate with longtime friend, costume designer Sophie Hart-Walsh, who said, "We always used to write songs about our lives and sing them to each other. We always said we should make them into a musical."
No details on subject matter or firm plans were revealed, though Welch added, "It would be amazing to get it into the West End. That's obviously the dream goal."
Florence + the Machine has released two albums, "Lungs" in 2009 and "Ceremonials" in 2011. The group played a sold-out Radio City concert last May, which was broadcast on Fuse TV. Stand-out songs include "Dog Days Are Over," "Rabbit Heart (Raise It Up)," "Howl," "Shake It Out," "What the Water Gave Me" and "Never Let Me Go."