For me, I like the movie version because the look Kay has when Mike steps out of the car to me is a mixture of surprise and she obviously is looking at him differently. Not romantically, more like "what the hell?" The gangster clothes, hat, etc. I think it works well with the audience too because I think the last scene before that one is when he's still in Sicily, looking semi-normal.

"I'll get a message to that girlfriend of yours - when I think the time is right"