One of the most celebrated and prolific playwrights of American theater has died.

Neil Simon died early Sunday morning at New York-Presbyterian Hospital, due to complications from pneumonia. 

Simon was a Bronx native. He was known for his Tony Award-winning productions of "The Odd Couple" and "Lost in Yonkers."

In all, he wrote 47 plays and productions, including "Barefoot in the Park" and "Promises, Promises," "Sweet Charity," "Biloxi Blues" and "The Sunshine Boys."

His plays often centered around the working or middle class, drawing extensively from his own personal experiences being raised during the Depression. His dad was a salesman. Simon was mostly raised by his mom and was mentored by his older brother Danny. 

Simon was a two-time Pulitzer Prize winner. He had a Broadway theater named after him in 1983. 

His wife, Elaine Joyce Simon, was at his bedside when he died, along with Simon’s daughters, Ellen and Nancy. 

Neil Simon was 91.