Drea de Matteo, Shooter Jennings Welcome a Son
04/08/2011 AT 01:25 PM EDT
"Waylon Albert 'Blackjack' Jennings has arrived," Jennings, 31, Tweeted Thursday. "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's first name.
Jennings and Sopranos alum de Matteo, 39, have been together for nine years and got engaged on stage in New York in June 2009.