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Twins Charlotte and Samantha Ronson turn 32 today. David Duchovny is turning 49. Charlize Theron is 34. Author and radio personality Garrison Keillor is 67. Conservative political commentator Alan Keyes turns 59. Wayne Knight, the actor best known for playing Newman on Seinfeld, is turning 54. And Jimmy Wales, the co-founder of Wikipedia, is 43 today—at least according to his Wikipedia page. A handful of weekend birthdays—including that of Michael Kors, Chris Cuomo and Dustin Hoffman—follow below.

Saturday: Dustin Hoffman (72); John Varvatos (55); real estate broker Deborah Grubman (57); Roger Federer (28); Robin Quivers (57); U2's The Edge (48); party planner David Monn (46); Deborah Norville (51); Drew Lachey (33); JC Chasez (33); and Paris Latsis, the Greek heir and former fiancé of Paris Hilton (30).

Sunday: Michael Kors (50); Chris Cuomo (39); Allure editor Linda Wells (51); Whitney Houston (46); Melanie Griffith (52); Hoda Kotb (45); real estate broker Larry Kaiser (68); designer Peter Marino (60); Eric Bana (41); Gillian Anderson (41); former NFL star Deion Sanders (42); and Divine Brown, Hugh Grant's old friend (40).