Kevin Costner On Diaper Duty -- For 5th Time!

5/7/2007 11:59 AM PDT

Kevin Costner on Diaper Duty -- for 5th Time!

TMZ has learned that 52-year-old Kevin Costner and his wife Christine, 33, welcomed a new baby boy into the world on Sunday. We're told Cayden Wyatt Costner weighed 7 lbs., 14 oz. and has dark hair. This is the second Wyatt that Costner has produced.

Both mother and son are doing well. This is the fifth child for Costner, the first for Christine.

Costner will be a perky 70 when Cayden graduates from high school.