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It's a big birthday for Jennifer Lopez. She's celebrating the big 4-0 today. Other people who will be blowing out candles this fine Friday: Broadway star Kristin Chenoweth is turning 41. Anna Paquin is 27. Director Doug Liman turns 44. Director Gus Van Sant is turning 57. Billionaire investor Nelson Peltz is 67. Artist Alex Katz is turning 82. Senator Claire McCaskill is 56. Governor Charlie Crist of Florida is 53. Barry Bonds turns 45. Retired basketball stars Rick Fox and Karl Malone are turning 40 and 46, respectively. Michael Richards of Seinfeld fame is turning 60. Actor Dan Hedaya is 69. And Wonder Woman—actress Lynda Carter—celebrates her 58th birthday today. Weekend birthdays after the jump.

Saturday: Christine Quinn (43); Iman (54); Mets pitcher Billy Wagner (38); restaurateur Geoffrey Zakarian (50); Sonic Youth's Thurston Moore (51); World Bank president Robert Zoellick (56); Matt LeBlanc (42); actor James Lafferty (24); and porn star Tera Patrick (33).

Sunday: Kevin Spacey (50); Mick Jagger (66); Jeremy Piven (44); Leigh Lezark (25); Kate Beckinsale (36); Sandra Bullock (45); Joe Jackson (80); Helen Mirren (64); artist Tom Sachs (43); architect Hugh Hardy (77); retired figure skater Dorothy Hamill (53); and Gossip Girl's Taylor Momsen (16).