Credit: Steve Granitz/

Justin Guarini is the proud father of a baby boy, his rep Jeff Ballard confirms to Us Weekly.

The American Idol alum, 32, and wife Reina Capodici welcomed son William Neko Bell at 6:26 a.m. Tuesday. The newborn weighed in at 7 lbs., 2 oz.

William joins big sister Lola, 6, from Capodici's previous relationship.

The singer, who ended his run on Broadway's American Idiot on Sunday, wed Capodici in his hometown of Doylestown, Penn. in September 2009.