Update: the movie didn't get any better. The costumes were really suspect -- a liberal interpretation of period fashions and wigs. Super odd.
And one interesting fact: Louis XV had smallpox twice, and the second round, when he was in his 60's, killed him. The real Louis XV looked more like Robert Downey Jr. than Johnny Depp. He was a good looking man back in the day, and apparently was happier hanging out with mistresses than governing. He left a long line of illegitimate offspring as well as the official children by Marie Leszczynska. His grandson would succeed him.