Josh Hartnett turns 31 today. Robin Williams is turning 58. Doonesbury creator Garry Trudeau turns 61 today. Defense attorney Ben Brafman is turning 61, too. Yankees star CC Sabathia is turning 29. Cat Stevens is 61. Comedian Jon Lovitz turns 52. Architect David Rockwell is 53. Music mogul Martin Bandier turns 68. Former PaineWebber CEO and now investor Don Marron is turning 75. Democratic lobbyist Bill Lynch is 68. Attorney Ken Starr is 63. Former U.S. Attorney General Janet Reno is turning 71. Actor Justin Bartha is 31. And model/actress Ali Landry turns 36 today.

Josh Hartnett is all grown up! The star of Pearl Harbor and 40 Days, 40 Nights (and former boyfriend of ScarJo), turns 30 today. Doonesbury creator (and husband of Jane Pauley) Garry Trudeau turns 60 today, as does defense attorney Ben Brafman. Robin Williams is 57. Architect David Rockwell will be 52. Music mogul Martin Bandier turns 67. Private equity investor (and former PaineWebber CEO) Donald Marron is 74. Democratic lobbyist Bill Lynch turns 67. And actor Justin Bartha, the former flame of Lydia Hearst and current boyfriend of Ashley Olsen, is 30.

The man behind the "Doonesbury," Trudeau is probably the most famous comic strip artist in America. He's also the husband of erstwhile NBC anchor Jane Pauley.

In yesterday's Doonesbury comic, cartoonist Garry Trudeau mentions online music service Pandora as a great place to make mix tapes. We pinged Pandora founder Tim Westergren who says it was a "complete surprise" to see the plug. Yesterday's comic is above, and today's is below the jump.