Heralded racing driver Pierre Chaillot has never noticed the pretty young flight attendant who dotes on him adoringly. But when his fiancée's infidelity drives him to the brink of suicide, Pierre's guardian angel takes the form of this stewardess to urge him to choose life. Though the angel confesses her divinity, Pierre is skeptical of the existence of angels. But, despite their difference, the two bond during her brief sojourn in human form.
| Actor | Role |
|---|---|
 Romy SchneiderLine / The Angel | Line / The Angel |
 Henri VidalPierre Chaillot | Pierre Chaillot |
 Michèle MercierAugusta de Munchenberg | Augusta de Munchenberg |
 Jean-Paul BelmondoMichel Barrot | Michel Barrot |
 Margarete HaagenChief of Angels | Chief of Angels |
 Erika von ThellmannAunt Augusta | Aunt Augusta |
 Ernst WaldowCorelli | Corelli |
 Jean TissierPresenter | Presenter |
 Pierre SergeolCommissioner | Commissioner |
 Franz-Otto KrügerDentist | Dentist |
| RRené WormsValet | Valet |
 Jean BrochardLine's father | Line's father |
 Paulette DubostLine's mother | Line's mother |
| MMario BeunatRadio commentator | Radio commentator |
 Albert DinanNot listed | Not listed |
 Lucien CallamandMan waiting at wedding | Man waiting at wedding |
 Jean PanisseGas station attendant | Gas station attendant |
| RRoland RodierTenor Antonio | Tenor Antonio |