Mimi O'Donnell Left Philip Seymour Hoffman Before He Overdosed

Oscar-winning actor Philip Seymour Hoffman had split from his longtime girlfriend Mimi O'Donnell only months before his death over the weekend from an apparent heroin overdose. He was found with a syringe sticking from his arm.

Hoffman, 46, was found in an Greenwich Village apartment in New York City after O'Donnell said Hoffman never showed up to pick up the couple's three children, the Daily Mail also reported.

The Daily Mail reported that Hoffman was found in his underwear on his bathroom floor. The actor, 46, began renting the $10,000-a-month Greenwich Village apartment in October, near where the couple had shared another space.

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"It is my understanding that Mr. Hoffman and his girlfriend were separated," authorities told the Daily Mail of his relationship with O'Donnell, also 46. The couple was together for 14 years and had children range in ages 10, 7 and 5, stated the newspaper.

CNN reported that it was common to see Hoffman in Greenwich Village riding a bicycle and walking his children to school.

"He'd go quietly about his business with his children," CNN Rose Arce told the television network, saying her daughter attended the same public school as Hoffman's kids. "I still remember the day he won the Oscar, him walking his kids to school, not long after. And people were giving him high fives."

"It looked like it really meant something to him to have his neighbors saying congratulations. It's shocking, and I know everyone in the neighborhood is going to feel like they're missing a friend, like a friend has died," Acre continued.

Hoffman was nominated for Academy Awards four times, winning in 2006 for his portrayal of Truman Capote in the movie "Capote," according to IMDb.com.

The Daily Mail reported that Hoffman attended the 2014 Sundance Film Festival in January to promote his movies "God's Pocket" and "A Most Wanted Man."

TMZ reported that Hoffman had checked himself into drug rehab last May, admitting he had relapsed after a long period of sobriety. He told the celebrity website then that he was attempting to end his addiction to heroin.

According to TMZ, Hoffman had been clean for 23 years before beginning his drug use again in 2012.

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