Bee Shaffer turns 22 today. Manhattan District Attorney Robert Morgenthau is turning 90. Billionaire financier Leon Black is 58. Harry Potter author J.K. Rowling is 44. Wesley Snipes is turning 47. Muckraking defense attorney Ron Kuby is 53. Another muckraker, entrepreneur Mark Cuban, is 51. Theater director Oskar Eustis turns 51. Ezra Zilkha is 84. The Office's B.J. Novak is 30. And actor Dean Cain is 43 today. Below, the birthdays of some people celebrating this weekend.