"It's a love letter to Puerto Rico," he said of the track, set for release next week.
Hamilton mastermind Lin-Manuel Miranda has organized what could be an all-star charity single to raise money for disaster relief in Puerto Rico in the aftermath of Hurricane Maria.
He's not revealing the song's title just yet, but it will be available on Oct. 6, according to CNN.
Miranda, whose parents came to the United States from Puerto Rico, said he "called every Puerto Rican I know" to contribute to the song. Two of the people participating are singer Ruben Blades and Hamilton castmate Anthony Ramos, who each belt out "Puerto Rico" in brief previews Miranda posted to Twitter.