Denis Clifford Quilley, OBE was an English actor and singer. From a family with no theatrical connections, Quilley was determined from an early age to become an actor. He was taken on by the Birmingham Repertory Theatre in his teens, and after a break for compulsory military service he began a West End career in 1950, succeeding Richard Burton in The Lady's Not For Burning. In the 1950s he appeared in revue, musicals, operetta and on television as well as in classic and modern drama in the theatre.

Privates on Parade: A Play with Songs in Two Acts is a 1977 farce by English playwright Peter Nichols, with music by Denis King. The drama draws upon Nichols' own experiences in the real-life Combined Services Entertainment, the postwar successor to ENSA, Entertainments National Service Association. The play is noteworthy for, inter alia, a series of musical numbers, performed by the male lead, parodying the style of such performers as Noël Coward, Marlene Dietrich and Carmen Miranda.