April 08, 2011 01:05 PM

John Shearer/WireImage

It’s a boy for Drea de Matteo and Shooter Jennings.

Waylon Albert ‘Blackjack’ Jennings has arrived,” Jennings, 31, Tweeted, announcing the birth of his son Thursday morning, April 7. “Thanks for all the kind words folks! We’re super lucky to have so many kind friends!”

Baby Blackjack joins big sister Alabama Gypsyrose, 3, and carries on his father and country crooner grandfather Waylon Jennings‘ first name.

Jennings and Sopranos alum de Matteo, 39, have been together nine years and were engaged on stage in New York in June 2009.

— Sarah Michaud

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