Kevin Costner's wife Christine gave birth to a baby boy on Sunday.
The couple's first child together, Cayden Wyatt Costner, weighed a healthy 7lbs 14oz.
Kevin's representative said: "Both mother and son are doing well."
This is "The Dances With Wolves' star's fifth child, but 33-year-old Christine's first.
Kevin, 52, has three children - Anne, 22, Lily, 20, and Joe, 19 - from his marriage to his college sweetheart, Cindy Silva, who he divorced in 1994. He also has a ten-year-old son, Liam, from his relationship with heiress Bridget Rooney.
Kevin and Christine announced the pregnancy in February, when asked how he was preparing for the new arrival, the Oscar-winning actor said: "There are a lot of books to read!"
The couple began dating in 1998 and married in September 2004, at Kevin's 165-acre Colorado ranch near Aspen.