http://www.psychologytoday.com/blog/the-scientific-fundamentalist/201012/beautiful-people-really-are-more-intelligent

Beautiful People Really ARE More Intelligent
Intelligence is just as strongly correlated with beauty as with education

Beautiful people have higher intelligence than ugly people, especially if they are men.

Genetic quality may be a common cause for both (such that genetically healthier people are simultaneously more beautiful and more intelligent). Alternatively, the association may result from a cross-trait assortative mating, where more intelligent and higher status men of greater resources marry more beautiful women. Because both intelligence and physical attractiveness are highly heritable, their children will be simultaneously more beautiful and more intelligent. Regardless of the reason for the association, the new evidence suggests that the association between physical attractiveness and general intelligence may be much stronger than we previously thought.

Attractive NCDS respondents have the mean IQ of 104.23, whereas unattractive NCDS respondents have the mean IQ of 91.81. The difference between them is 12.42.

the correlation between physical attractiveness and intelligence in NCDS is exactly the same, down to the third decimal point, as the correlation between intelligence and education. Both correlations are .381. Everybody knows that intelligence and education are very highly correlated. What they don’t know is that physical attractiveness is equally highly correlated with intelligence as education is. If you want to estimate someone’s intelligence without giving them an IQ test, you would do just as well to base your estimate on their physical attractiveness as you would to base it on their years of education.

the association between physical attractiveness and intelligence is stronger among men than among women. In the NCDS sample, the attractive women have a mean IQ of 103.64, and the unattractive women have a mean IQ of 92.25. The difference between them is 11.39.

In contrast, the attractive men in the NCDS sample have a mean IQ of 105.00, and the unattractive men have a mean IQ of 91.39. The difference between them is 13.61