Frank Daniel Gilroy (born October 13, 1925) is an American playwright, screenwriter, and film producer and director whose play The Subject Was Roses won the Pulitzer Prize for Drama and the Tony Award for Best Play. His play Contact with the Enemy was nominated for the 2000 Drama Desk Award for Outstanding New Play.
Gilroy has also written fiction, including the novel From Noon Till Three, which was adapted into a film starring Charles Bronson. In addition to writing the screenplay, Gilroy also directed the film. Gilroy also contributed to several TV westerns in the late 1950s, including Have Gun - Will Travel and Wanted: Dead or Alive. His later credits include a 1977 adaptation of Rex Stout's Nero Wolfe novel The Doorbell Rang as a television movie featuring Thayer David.