Adapted by Norman Krasna from his play Kind Sir , Indiscreet stars Ingrid Bergman as a wealthy actress and Cary Grant as an international financial wizard. While Grant is visiting London, Bergman 's sister Phyllis Calvert and brother-in-law Cecil Parker introduce Grant to Bergman . Because he feels he has no time for marriage, Grant pretends to be married to avoid romantic tangles. Bergman , however, finds the prospect of an affair with a married man to be quite exhilarating. When she discovers the truth, Bergman gets even with the now-smitten Grant by faking a romance with an ex-boy friend—ordering luckless chauffeur David Kossoff to pose as her beau. A comedy by grownups, about grownups and for grownups (at least by 1958 standards), Indiscreet proved to be far more successful as a film than as a stage play. — Hal Erickson