Come September

Robert Talbot, an American millionaire, arrives early for his annual vacation at his luxurious Italian villa. His long-time girlfriend Lisa has given up waiting for him and has decided to marry another man. Meanwhile, his sneaky business associate Maurice secretly misappropriates the villa as a hotel while Talbot is away. The current guests of the "hotel" are a group of young American girls.

• 
  Robert Mulligan
• 
  Joseph E. Kenney

• 
  Rock Hudson
  Robert L. Talbot
• 
  Gina Lollobrigida
  Lisa Helena Fellini
• 
  Sandra Dee
  Sandy Stevens
• 
  Bobby Darin
  Tony
• 
  Walter Slezak
  Maurice Clavell
• 
  Brenda De Banzie
  Margaret Allison
• 
  Rossana Rory
  Anna
• 
  Ronald Howard
  Spencer
• 
  Joel Grey
  Beagle
• 
  Ronnie Haran
  Sparrow
• 
  Christopher Seitz
  Larry
• 
  Cindy Conroy
  Julia
• 
  Joan Freeman
  Linda
• 
  Nancy Anderson
  Patricia
• 
  Michael Eden
  Ron
• 
  Claudia Brack
  Carol
• 
  Nello Appodia
  Station Master (uncredited)
• 
  Liliana Celli
  Seamstress (uncredited)
• 
  Pietro De Vico
  Poliziotto (uncredited)
• 
  Liana Del Balzo
  Mother Superior (uncredited)