Young Looking Tony Curtis

Cool movie. He seems to have played a lot of likeable con artists throughout his long career. This movie might've been the last one in which he still looked like he was still in his 30s, even though I believe he was in his early 40s when he made this one. He's really trim, almost skinny. He has a good head of hair before the sideburns (not sure if he wore a wig back then). And his facial features are still pretty boyish.

Question: Is this the last film Tony Curtis made before he started to look old? Is there any other film after this movie that captures the cool young Tony Curtis of Sweet Smell of Success and Some Like Them Hot.

This film might be more important to Tony Curtis than even he realized. It is like he was saying goodbye to his youth.