David Marshall Grant is the youngest of three children (the older two, a brother and a sister, became psychiatrists). He received his acting training from the Yale School of Drama, the Julliard School of Drama, and the Weber Douglas Academy of Dramatic Arts. He was nominated for a Tony award for his performance in the Tony Kushner play Angels in America. In the late '90s, Grant added a new credit, playwright. His play, entitled Snakebit, received a 1999 Drama Desk and Critics Circle nomination for best play.