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Kevin Costner, Christine Baumgartner

Jordan Strauss/ Getty Images

If Mel Gibson is Octo-Mel, Kevin Costner is now Septa-Kev.

The still-hunky 55-year-old welcomed his third child with wife Christine, daughter Grace Avery Costner, today in Los Angeles.

"Both mother and daughter are doing well," the actor's rep said in a statement. The Costners' new addition arrived at 5:46 p.m., weighing 7 pounds, 11 ounces, and measuring 21 inches long.

Costner also has two sons with Christine, his second wife, and now seven children overall between the ages of 26 (daughter Anne) and just hours old (little Grace).

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Oh how we love watching Famous Families get bigger!