MUMBAI: An American producer Cass Warner is planning to make a sequel to the 1942-made Hollywood classic Casablanca that starred Humphrey Bogart and Ingrid Bergman.

The film -- the lines of which like Here's looking at you kid and Play it again, Sam -- are still quoted by film lovers, revolved around two star-crossed lovers Rick Blaine and Ilsa Lund who reunite in Casablanca during the World-War II only to separate later.

Warner is trying to find backers for a proposal written by the late Howard Koch, one of the three who got a screenwriting Oscar for the film.

Titled Return to Casablanca, the sequel would follow the story of Richard Blaine, the son of Bogart's Rick Blaine and Ingrid Bergman's Ilsa Lund as he tries to find his father. The boy was conceived the night Ilsa came to Rick's place to plead for the Letters of Transit, and she kept it a secret from her husband Victor Laszlo, played by Paul Henreid.

Among the skeptics about the remake is Stephen Bogart, the 64-year-old son of Humphrey Bogart and Lauren Bacall. "If they want to make a movie about intrigue in North Africa, that's fine, but bringing the specter of one of the greatest movies of all time into it makes it just another feeble attempt at Casablanca 2," Stephen has reportedly said.