I have often noted that one can easily identify the decade in which a fantasy or historical movie was made simply by looking at the heroine. Fashions in beauty change over time; while none of the heroines look downright ugly, the girls from an 80s or 60s movie would definitely not be cast as the most beautiful woman in the world today. (The 20s are perhaps the worst of all; whereas the stars from the 40s movies still look incredible.)
Sometimes it seems to be a bit more consciously done: I have always thought that in the Pride & Prejudice miniseries, while Elizabeth is far more appealing to modern eyes, one can see that Jane might well better fit the image of beauty of the neoclassical era.
Anyway, I have always reflected with some comfort that the only thing that keeps me (or any other reasonably decent-looking young woman) from being dazzlingly beautiful is being born in the wrong era. And perhaps a good makeup artist.