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Love And Theft's Stephen Barker Liles has a new title - dad.  The country singer and his fiancée Jenna Kennedy are celebrating the arrival of their first child, Jett Barker Liles, who was born in a Nashville hospital Monday morning. 

Stephen says he and Jenna are "so thrilled to be parents," calling it "the best thing that has happened" to them.  He adds that his son's birth was "the greatest rush" he's ever experienced. 

The singer also praises Jenna, saying she was "awesome, calm and collected" all throughout her labor - during which they "stayed up all night and watched 'SportsCenter' and 'Friends.'" 

Stephen adds that he didn't immediately introduce his son to his own music, but that they "listened to Mozart during the delivery." 

Jett made his entry into the world one day early.  In announcing Jenna's pregnancy, Liles said the baby was due December 3rd.  And with Jett's arrival, both Stephen and his Love And Theft partner Eric Gunderson have become dads in 2013.  Eric and his wife, Emily, welcomed their son Camden William Gunderson on March 10th - more than two months before the baby's May 18th due date.