Costner calls Hayes "a great Western name."
Costner's wife Christine Baumgartner gave birth to Hayes Logan Costner last night in Los Angeles. A publicist says Hayes weighs 8 pounds, 15 ounces.
He's the second son for Costner and Baumgartner. Their other boy, Cayden, is 21 months old.
Costner also has three grown children from a previous marriage.
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