King of the Roaring 20s: The Story of Arnold Rothstein is a 1961 American, biopic, drama, crime film directed by Joseph M. Newman, produced by Samuel Bischoff and starring David Janssen, Dianne Foster, Diana Dors and Jack Carson.

[1] The film is about the prohibition era gangster Arnold Rothstein, who rises to be a major figure in the criminal underworld.

Rothstein has a lifelong pal, Johnny Burke, and makes a deadly enemy, Phil Butler, a corrupt cop.

He rises to become rich and well known in gambling circles, often using ruthless tactics, like tricking business partner Jim Kelly into sacrificing his half of their arrangement.

He devotes little effort to their marriage, his principal obsessions being to build a huge bankroll and to someday win a poker hand with a royal flush.

He and lawyer Tom Fowler conspire to make sure Butler is exposed and convicted for his criminal activities.

[7][8][9] Producers Sam Bischoff and David Diamond had previously made The Phenix City Story.

[13] The film does not explore Rothstein's possible involvement in the fixing of 1919 Baseball World Series, known infamously as the Black Sox Scandal.