Following the commercial success of "What's New Pussycat?", Charles Feldman again brought together Sellers and Woody Allen for his next project, "Casino Royale", which also starred Orson Welles; Sellers signed a $1 million contract for the film ($ in dollars). Seven screenwriters worked on the project, and filming was chaotic. To make matters worse, according to Ekland, Sellers was "so insecure, he won't trust anyone". A poor working relationship quickly developed between Sellers and Welles: Sellers eventually demanded that the two should not share the same set. Sellers left the film before his part was complete. A further agent's part was then written for Terence Cooper, to cover Sellers's departure.