Naomi Watts & Liev Schrieber Reveal New Baby's Name

A pregnant Naomi Watts and Liev Schreiber attend a screening of 'Filth and Wisdom' in New York A pregnant Naomi Watts and Liev Schreiber attend a screening of 'Filth and Wisdom' in New York

Samuel Kai Schrieber – welcome to your showbiz family.

Naomi Watts and partner Liev Schrieber have revealed the name of their newborn son, who Naomi gave birth to on Saturday.

Samuel, who weighed in at 7 lbs., 13 oz., is the couple’s second child. They also have a year-and-a-half-old son named Alexander Pete Schreiber.

“Both mom and baby are doing great,” a rep for the actress told People.

As previously reported on AccessHollywood.com, Liev said he and Naomi have been preparing Alexander for the impending arrival.

“Naomi’s been teaching him ‘Kiss the Baby,’ which basically involves him going up to kiss the bump,” Liev told AccessHollywood.com’s Laura “Dish of Salt” Saltman at the “Defiance” junket last week. “I don’t think he knows yet that there’s something lurking in there that’s about to seize the spotlight from him forever.”

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