Law & Order's Mariska Hargitay turns 45 today. Developer Bruce Ratner is turning 64. Broadway heir James L. Nederlander Jr. is 49. Citigroup investment banking chief (and Obama BFF) Raymond McGuire turns 52. Tiffani-Amber Thiessen is 35. Legendary French actress Jeanne Moreau is 81. And Princess Caroline of Monaco is turning 52. Weekend birthdays after the jump!