 Burt LancasterNed Merrill | Ned Merrill |
 Janet LandgardJulie Ann Hooper | Julie Ann Hooper |
 Janice RuleShirley Abbott | Shirley Abbott |
 Tony BickleyDonald Westerhazy | Donald Westerhazy |
 Marge ChampionPeggy Forsburgh | Peggy Forsburgh |
| NNancy CushmanMrs. Halloran | Mrs. Halloran |
| BBill FioreHowie Hunsacker | Howie Hunsacker |
 Rose GregorioSylvia Finney | Sylvia Finney |
 David GarfieldTicket Seller | Ticket Seller |
 Kim HunterBetty Graham | Betty Graham |
 Charles DrakeHoward Graham | Howard Graham |
 Bernie HamiltonChauffeur | Chauffeur |
 House JamesonMr. Halloran | Mr. Halloran |
| JJimmy JoyceJack Finney | Jack Finney |
| MMichael KearneyKevin Gilmartin | Kevin Gilmartin |
| RRichard McMurrayStu Forsburgh | Stu Forsburgh |
 Jan MinerLillian Hunsacker | Lillian Hunsacker |
 Diana MuldaurCynthia | Cynthia |
| KKeri OlesonVernon | Vernon |
 Joan RiversJoan | Joan |
 Cornelia Otis SkinnerMrs. Hammar | Mrs. Hammar |
 Dolph SweetHenry Biswanger | Henry Biswanger |
 Louise TroyGrace Biswanger | Grace Biswanger |
 Diana Van der VlisHelen Westerhazy | Helen Westerhazy |
 Philip BrunsBiswangers' Pool Party Guest (uncredited) | Biswangers' Pool Party Guest (uncredited) |
| AAlva CelauroMuffie (uncredited) | Muffie (uncredited) |
 John CheeverMan at Pool Party (uncredited) | Man at Pool Party (uncredited) |
 Lisa DanielsMatron at the Biswangers' Pool (uncredited) | Matron at the Biswangers' Pool (uncredited) |
| HHugh FranklinDenny (uncredited) | Denny (uncredited) |
| JJohn GerstadBunkers' Pool Party Guest (uncredited) | Bunkers' Pool Party Guest (uncredited) |
