Your favorite art-collecting, Greenwich-living, publicity-shunning hedge fund billionaire, Steve Cohen (left), turns 53 today. New York's most famous drag queen, Lady Bunny (right), is turning 47. Marcia Gay Harden is 50. Photographer Terry Richardson is turning 44. Halle Berry turns 43. Steve Martin is 64. Oscar-winning composer James Horner is turning 56. Tony-winning playwright Thomas Meehan turns 80. Magic Johnson is 50. Actress Mila Kunis is 26. Susan Saint James, the actress and wife of NBC Sports chairman Dick Ebersol, is turning 63. Musician David Crosby is 68. E! host and Top Model regular Jay Manuel is turning 37. And romance novelist Danielle Steel is celebrating her 62nd birthday today. Weekend birthdays are below.