The playwright of the Tony Award-winning play 'Plaza Suite' is Neil Simon, whose last name is spelled out in five letters: S-I-M-O-N. Neil Simon was an American playwright, screenwriter, and author who wrote more than 30 plays and nearly the same number of movie screenplays. He was one of the most successful and prolific playwrights of the 20th century, and his works were often set in New York City.