Kilty has written a number of notable plays including: Dear Liar, full title Dear Liar: A Comedy of Letters is a play by Kilty that had a successful run in New York, which was based on the correspondence of famed playwright George Bernard Shaw and actress Mrs. Patrick Campbell.
The play was brought to the screen in 1981 by the director Gordon Rigsby with the lead roles by Jane Alexander as Mrs. Patrick Campbell and Edward Herrmann as George Bernard Shaw.
The film directed by Alexandre Tarta had in lead roles Edwige Feuillère as Mrs. Patrick Campbell and Jean Marais as George Bernard Shaw.
[citation needed] Kilty and Humphrey toured the world performing Dear Liar: A Comedy of Letters, beginning in 1964.
[citation needed] He was born in Baltimore, Maryland of Irish descent on his father's side, but raised on the Pala Indian Reservation, San Diego County, California.