Curtis, whose previous band was Secret Machines, had been diagnosed with T-cell lymphoblastic lymphoma less than a year ago, E! Online reported. He died Sunday at Memorial Sloan-Kettering Cancer Center in New York City, Seven Bells manager Brady Brock said.
"We lost our friend and brother Benjamin Curtis to his fight against cancer," the band said in a post on its Facebook page. "We kindly ask that his immediate family, friends & bandmates' privacy be respected during this time...We can't thank all of you who supported him and his music through the years enough.
"All of you who attended or participated in the various benefits in and around New York City over the past year since his diagnosis, and of course those who contributed and gave generously to help support him throughout that journey."