William "Bill" Finn, the Tony Award-winning writer and composer of Falsettos, has died, his literary agent, Ron Gwiazda, confirmed to The Hollywood Reporter. He was 73. The cause of death was not immediately available.

An acclaimed musical theater writer, he won for both his score and his book and later had a huge hit with “The 25th Annual Putnam County Spelling Bee.”

Composer William Finn, best known for the musical 'Falsettos,' has died at the age of 73. His cause of death has been revealed.