Cayden Wyatt Costner was born late Sunday at a Los Angeles area hospital. It is the couple's first child together.
The actor's publicist, Paul Bloch, says, "Both mother and son are doing well."
Costner has three children with former wife Cindy Silva--Annie, Lily and Joe. He also has a son, Liam, with Bridget Rooney.
The Untouchables star married Christine three years ago, and Cayden is her first child.
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