Black told "Entertainment Tonight" his wife Tanya gave birth to son Jack more than a week ago.
The couple, who married in 2006, also has a son Samuel, who is nearly 2.
The comic actor told the entertainment news program baby Jack is "fresh out of the oven." He also confided he has been changing a lot of diapers in the past week.
Kris and Bruce Jenner divorcing
Aaron Carter will 'shut up' about ex Hilary Duff