Kevin Costner, 54, and his wife, Christine Baumgartner, 34, had a baby boy on Thursday in Los Angeles. Hayes Logan Costner weighed in at 8 lbs., 15 oz. The couple, who were married in 2004, have another son, Cayden Wyatt, who was born in May 2007. Costner also has three children from a first marriage. (Photo: WENN)