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Drea de Matteo and Shooter Jennings are parents again! A rep for the couple confirms to that the pair welcomed a son Thursday morning.

"Waylon Albert 'Blackjack' Jennings has arrived," Jennings, 31, wrote on his Twitter page. "Thanks for all the kind words folks! We're super lucky to have so many kind friends!"

The Sopranos actress, 39, and the rocker, who have been engaged since 2009, are also parents to a three-year-old daughter, Alabama Gypsyrose.

"Drea's the best mother in the world," Jennings told Us earlier this year. "I love her so much. She is such an important part of our lives."

And he hinted this might not be their last baby. "The more children we can have the better, we want a bunch of kids!"