Director Sam Peckinpah insisted on changing an early expository scene in which a girl in her underwear is massaged with a vibrator. He removed the vibrator from the scene altogether and had the girl lie naked but completely covered with a fur coat. Producer Martin Ransohoff was unhappy with the shift in tone and fired Peckinpah.
Mitzi Gaynor campaigned for the role of "Lady Fingers", but it ended up going to Joan Blondell. Rumors are abound as to why Blondell got the role, with the most common being that Gaynor and Ann-Margret did not quite get along.
The trivia items below may give away important plot points.
According to an article written by Michael Wiesenberg of Card Player Magazine, "[t]he odds of the two hands appearing in the same deal [in the climactic scene] are worse than 45 million-to-1."
This is the second movie in which Edward G. Robinson plays a gambler that features a straight flush in diamonds. Smart Money has the final credits superimposed over this hand, which is also the final hand in this movie.