At first rather annoying in its heavy emphasis on reenactments, this movie ultimately proves fascinating, simply because the complicated, highly dramatic tale it tells still almost defies belief.

Unshakable, witty and deeply felt, the film will be paying emotional dividends for a long, long time.

It is a whirlwind of delight --- attractive actors, stunning couture, spectacular sets and outrageous parties.

One of the film's great tricks is that, for a time, you think it will go down a rabbit hole of unrealistic glorification.