Michelle Williams Heads Back to Work

She was in town to shoot additional scenes for her upcoming movie Mammoth.

On Saturday, Ledger, Williams' ex and the father of 2-year-old Matilda, was memorialized in his hometown of Perth, Australia. A service attended by hundreds and private funeral was held for 10 of his close friends and family.

After the service, guests ran into the nearby ocean. "After a while Michelle Williams came down and went swimming in her dress. Security guards were waiting for her with a towel when she emerged," a witness told Usmagazine.com.

"Everyone in the water started slapping the water and shouting, 'Heath,' in kind of mass relief that the stress of the occasion was behind them," the witness added.

Ledger, 28, was found dead on January 22 in his NYC apartment. He died of an accidental overdose of prescription drugs, the New York City medical examiner's office reported last week.

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