Gloria Grahame was awful, her character worse
The normally very capable Gloria Grahame delivered the worst performance of her career in The Man Who Never Was, but it's only partly her fault.
Her character Lucy is one of the most obnoxious people I've ever seen on screen, particularly as a romantic lead. She's loud, coarse, sarcastic, lippy, smart-alecky, cynical, self-absorbed...what have I missed? Her character was clearly an English screenwriter's one-dimensional concept of a brassy American, and so more caricature than character, and Gloria can't be blamed for the lines she was handed. But it must be said she took an inane role and made the worst of it. The reviews of this film were generally favorable, but Miss Grahame was almost universally singled out for a terrible performance, and deservedly so.
She was so bad, and her character so obnoxious, that it's unfathomable to think what in God's name her fiancee could possibly have found attractive about her, beyond her body. She had to have something to compensate for her unbearable persona.