Ve filmu Phffft hrají Judy Holliday (Nina Chapman Tracey), Jack Lemmon (Robert Tracey), Jack Carson (Charlie Nelson), Kim Novak (Janis), Luella Gear (Mrs. Edith Chapman), Donald Randolph (Dr. Van Kessel), Donald Curtis (Rick Vidal), Arny Freeman (Language Teacher (uncredited)), Eddie Searles (Tommy (uncredited)), Shirlee Allard (Secretary (uncredited)), Leon Alton (Nightclub Patron (uncredited)), Merry Anders (Marsha (uncredited)), Mylee Andreason (Dance Teacher (uncredited)), Frank Arnold (Art Teacher (uncredited)), Fay Baker (Nurse Serena (uncredited)), Eugene Borden (Teddy - Maitre d' (uncredited)), Paul Bradley (Nightclub Patron (uncredited)), Sue Carlton (Minor Role (uncredited)), Harry Cheshire (Nina's Divorce Lawyer (uncredited)), Sayre Dearing (Nightclub Patron (uncredited)), Jimmie Dodd (Cab Driver (uncredited)), Dan Dowling (Nightclub Patron (uncredited)), Charles Ferguson (Waiter (uncredited)), Bess Flowers (Nightclub Patron / Woman at Airport (uncredited)), Rudy Germane (Nightclub Patron (uncredited)), Kenneth Gibson (Nightclub Patron (uncredited)), James Gonzalez (Studio Executive (uncredited)), Dick Gordon (Technician (uncredited)), Geraldine Hall (Nina's Secretary (uncredited)), Sam Harris (Nightclub Patron / Man at Airport (uncredited)), Jerry Hausner (Steve (uncredited)), Charles Heard (Doorman (uncredited)), Bill Hickman (Studio Technician (uncredited)), Shep Houghton (Nightclub Patron (uncredited)), Joyce Jameson (Secretary (uncredited)), Virgil Johansen (Doorman (uncredited)), Joe Karnes (Minor Role (uncredited)), Tom Kingston (Manager (uncredited)), Charlotte Lawrence (Cynthia (uncredited)), Perk Lazelle (Nightclub Patron (uncredited)), Billy Lechner (Boy (uncredited)), Sally Mansfield (Miss Comstock (uncredited)), Maxine Marlowe (Secretary (uncredited)), Alphonse Martell (Maitre D' (uncredited)), Vivian Mason (Secretary (uncredited)), Harold Miller (Nightclub Patron (uncredited)), Patrick Miller (Page (uncredited)), Hans Moebus (Nightclub Patron (uncredited)), George Nardelli (Nightclub Patron (uncredited)), William Newell (Workman (uncredited)), Monty O'Grady (Nightclub Patron (uncredited)), Hamil Petroff (Dance Teacher (uncredited)), Gilman Rankin (Minor Role (uncredited)), Leoda Richards (Restaurant Patron (uncredited)), Cosmo Sardo (Nightclub Patron (uncredited)), Jeffrey Sayre (Party Guest (uncredited)), Bernard Sell (Nightclub Patron (uncredited)), Olan Soule (Mr. Duncan (uncredited)), Norman Stevans (Nightclub Patron (uncredited)), Brick Sullivan (Radio Technician (uncredited)), Hal Taggart (Restaurant Patron (uncredited)), Ted Thorpe (Minor Role (uncredited)).