Ingrid Bergman
I like Ingrid Bergman and she's been wonderful in so many films but in "Arch of Triumph" she is miscast as Joan.
Her acting is uninspired. It's like she's thinking of something else and not really present or enjoying the role. She was too healthy-looking to play a world weary prostitute starved of food and love. She looks too pleasantly plump for the part. Not an ounce of decadence or mischief in her portrayal of someone who uses her looks to get by in a world of men!
Her hair-do, which may be 1938, is also unflatterring.