It's Leonardo DiCaprio's big day: The actor turns 34 today. Stanley Tucci is 48. Demi Moore turns 46. Jane Pratt, the founder of Sassy and Jane magazines, is 46, too. Carson Kressley is 39. Calista Flockhart is turning 44. Senator Barbara Boxer is 68. Will & Grace co-creator Max Mutchnick is 43. Writer Mary Gaitskill is 54. Interior designer Mariette Himes-Gomez is 66. And Trey Smith, the son of Will Smith, is turning 16 years old.