Humphrey Bogart was a last minute replacement for Cary Grant. Bogart and William Holden couldn't stand each other. Bogart disapproved of Audrey Hepburn while Holden fell in love with her. Bogart got $300000, Holden got $150000, and Hepburn only $15000. Asked how he liked working with Hepburn, Bogart replied: "It's OK, if you don't mind to make a dozen takes."