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Ryan Phillippe's Ex-Girlfriend Alexis Knapp Welcomes Baby Girl

July 7th, 2011 2:36pm EDT

Alexis KnappRyan Phillippe is a dad again, according to reports.

The actor's ex-girlfriend, model Alexis Knapp, gave birth to a healthy baby girl on Friday, according to In Touch magazine.

Phillippe, who has a daughter and a son with ex-wife Reese Witherspoon, was by Knapp's bedside when little Kai was born at Cedars-Sinai Medical Center in Los Angeles.

The actor has yet to discover if he is officially the baby's biological father via a DNA test, but a source tells the publication, "He's acting like he is."

The Crash star, who recently split from actress girlfriend Amanda Seyfried, was photographed visiting Knapp's doctor with his ex last month.

Alexis Knapp

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