It's not just in hollywood, it's everywhere. Studies have shown that men tend to be most attracted to shorter than average women on sight (don't downvote me! I can link sources if you're interested) so part of it seems to be biology but it's reinforced by society which tells us that tall is masculine and short is feminine, therefor a woman that is taller than her man is deemed more masculine, and if a man is shorter than his woman is looked at as more feminine.
Short women and tall men have the most options to choose from potential mates, so I think it is sometimes strange they always seem to gravitate to each other rather than someone closer to their own size.
No, I am 6'2" and I have always been attracted to shorter girls. While most women don't get over 5'10" this leaves a lot of options for me. However, something about girls that are 5'-5'4" makes them look cute and innocent, which I like a lot.