Sean Penn has withdrawn last month's petition to separate from his wife of 13 years.

The Oscar-winning actor was granted a dismissal Tuesday of his request for a legal separation from actress Robin Wright Penn.

Penn told the New York Daily News that the filing was "an arrogant mistake."

The couple have had an on-and-off relationship. They filed for divorce in December 2007 but dismissed that petition several months later.

In February they attended the Academy Awards together, but the 48-year-old actor neglected to thank his wife after winning for his starring role in "Milk."

GEORGE HAMILTON GETTING NEW KNEE

George Hamilton is having his right knee replaced.

His publicist said the elective surgery was to be done yesterday in Chicago.

He said the 69-year-old Hamilton first injured his knee while starring in "Chicago" on Broadway, and decided to have his knee replaced after injuring it a second time while competing on the second season of ABC's "Dancing with the Stars" in 2006.

MOORE TACKLES FINANCIAL MELTDOWN

Michael Moore's documentary about the economic crisis will hit theaters Oct. 2, it was announced yesterday.

The film is not yet titled. Moore earlier planned to make it more broadly about America as an empire. Instead, the documentary explores the causes of the global economic meltdown. Moore has called it "the biggest swindle in American history."

Moore won an Oscar for "Bowling for Columbine."

JAY-Z SAYS ADIEU TO DEF JAM LABEL

There will be no encore for Jay-Z and Def Jam.

The rapper confirms that he has left the record company where he made most of his biggest hits and went from artist to president, and back to artist again.

In an interview with www.RapRadar.com, he thanks the label's executives and calls his time at Def Jam "a unique and fulfilling experience."

'AIRBENDER' STARS HAVE MARTIAL ARTS CRED

For years, Noah Ringer went by the nickname Avatar because he looked like the lead in the Nickelodeon cartoon "Avatar: The Last Airbender."

Now Ringer, 12, will make his feature-film debut opposite "Slumdog Millionaire" actor Dev Patel in M. Night Shyamalan's "The Last Airbender," a live-action version of the show. It's the first of a planned trilogy

Like his character Aang, who uses martial arts to manipulate the weather, Ringer keeps his head shaved and practices martial arts. Patel, too, has credentials. He has a black belt in tae kwon do and discovered the cartoon while filming "Slumdog." "I started watching it in my trailer in India," says Patel, who plays the villain Zuko, a "firebender" (he manipulates flames).