A new study in the Journal of Human Capital learned that even though the "level of formal education has no correlation with a movie star’s success, either in terms of box office earnings or the likelihood of winning an Oscar," movie stars still marry within their educational cohort:
What it says is that men and women have very strong preferences for non-financial partner traits correlated with education. And educational sorting would remain even if the tendency of men and women to work with colleagues of a similar educational background were to disappear or if the role of educational institutions as a meeting place for future husbands and wives were to disappear.
The Dish 