The baby is a boy, and People reports the couple has named him Luca. He joins six-year-old big sister Satine and dog Lucky as the newest addition to their family.
Barrett told the magazine after Satine was born, "It's amazing. Just seeing her every day... she's just started smiling, and it's just the simplest thing, a smile." The second-time mom has even more to celebrate now that Luca has arrived.
Macht and Barrett have been married since December 2004. Macht currently stars as Harvey Specter on the USA Network show Suits. Barrett, who also acts, will appear on this season of Fox's The Following and is set to star in an upcoming untitled Netflix series.