James M. Cain was so impressed with Lana Turner's performance he presented her with a leather-bound copy of the book inscribed, "For my dear Lana, thank you for giving a performance that was even finer than I expected."
John Garfield and Lana Turner had a brief affair, according to Garfield's friend, Warner Bros. director Vincent Sherman. He said Turner was the only co-star with whom Garfield ever became romantically involved. There had been sparks between the two since the first day of shooting, and the delays had sparked a close friendship. Finally, they shared a moonlit tryst on the beach but that was their only night together. The two realized that whatever was happening on-screen, off-screen they had no sexual chemistry together. They remained friends nonetheless.
This caused a stir amongst 1940s audiences, who were shocked when it seemed clear to them that John Garfield uses his tongue in one of his kissing scenes with Lana Turner.