Mel Gibson's Girlfriend Is Pregnant

It's official: Mel Gibson's girlfriend, Oksana Grigorieva, is pregnant.

The actor confirmed the news during a taping of NBC's The Tonight Show With Jay Leno to air tonight.

"I guess Im 'Octo-Mel,'" says Gibson, who already has seven kids with his wife of 28 years, Robyn.

Robyn filed for divorce six weeks ago amidst speculation that Grigorieva, a singer on Gibson's record label, was expecting a child.

"My wife and I, our marriage ended three years ago and weve been separated ever since then," Gibson tells Leno. "These things happen. It's unfortunate, it's sad, but you know she is an admirable woman -- we still got kids together, we're friends.

"Look," Gibson continues. "When it's all said and done, I did a pretty good hatchet job on my marriage myself. I'm to blame. If you're inclined to judge, put it here."

Gibson also says his separation from Robyn had nothing to do with Grigorieva, whom he didn't meet until 2008.

When asked by Leno if they would wed, Gibson says: "Why would you get married twice?"

According to reports, Grigorieva is in her second trimester and due this fall.

See more photos of celeb scandals.

Grigorieva, 38, and Gibson, 53, came out publicly as a couple at the April 29 premiere of X-Men Origins: Wolverine in Los Angeles.

The duo became close after Grigorieva was hired to compose a song on Gibson's thriller, Edge of Darkness, which filmed last summer in Massachusetts.

Check out pics of stars who hooked up on set.

"They would come out and attempt to walk around separately, but then at the end of the day, they both returned to the same hotel," an on-set source told Us Weekly. "She was there on and off for a week, but it was clear she had no business there other than to be with Mel."

See pictures of stars caught in an affair.

Grigorieva has a son with actor Timothy Dalton.

See Hollywood's priciest divorces.

Gibson -- worth about $900 million -- and his wife have no prenuptial agreement. Their divorce settlement could be the largest in history because, under California law, community property (including income) is divided 50/50.

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