If it had been up to his excited sisters, the new arrival in the Affleck family might have been called Donald Duck.
Luckily, parents Ben Affleck and Jennifer Garner intervened to name their new son Samuel.
The proud dad revealed the news on his Facebook page saying: "We are happy to announce on February 27, Jennifer gave birth to a healthy baby boy, Samuel Garner Affleck."
Little Samuel has two big sisters Violet, six, and three-year-old Seraphina.
And dad Ben, who is a huge fan of the Boston Red Sox baseball team, will have a little buddy to play ball with.
As a mum of two girls, Jennifer will be exploring the joys of having a son, after previously admitting to Ellen DeGeneres it would be "cool and different" to have a boy.
All the news as Duchess Kate's due date draws close...