Samuel Schreiber -- Naomi Watts's New Son!

Naomi Watts and longtime partner Liev Schreiber welcomed a baby boy in New York City on Saturday, December 13th, JustJared.com has learned.

“Both mom and baby are doing great,” Naomi‘s rep tells JJ.

Samuel Kai Schreiber weighed 7 pounds, 13 ounces at birth. This is the second child for 40-year-old Aussie actress and the 41-year-old Wolverine star. Their first son, Alexander ‘Sasha’ Pete Schreiber, is 16 months.

Congratulations to the happy couple!