In 2012, both and reported on efforts by Cass Warner, granddaughter of and friend of the late Howard Koch, to produce a sequel featuring the search by Rick Blaine and Ilsa Lund's illegitimate son for the whereabouts of his biological father.
Retrieved December 3, 2011.
Retrieved September 20, 2013.
A witness to the filming of the "duel of the anthems" sequence said he saw many of the actors crying and "realized that they were all real refugees".
Casablanca : Behind the Scenes.
The street used for the exterior shots had recently been built for another film, , and for the Paris.