The gay gossip, whose real name is Mario Lavandeira, Jr., announced the top secret baby news in a post on his website on Wednesday. He also offered up a first photo of himself cradling the unnamed tot.
Hilton wrote, "Dear Friends, I want you to hear this directly from me, right here. I am ready to announce that earlier this month I was blessed with the birth of my first child, a beautiful and healthy baby boy - with lots of hair on his tiny head! My family is overjoyed at this newest and most cherished addition."
And proving that becoming a dad has further softened the former news-breaking hardliner, he added, "Thank YOU for welcoming PerezHilton.com into your homes, offices, classrooms, cell phones and wherever else you may read my five websites. And thank you for welcoming ME into your lives!
"I am so humbled to welcome this little man into my life. And I am honored and ready for the challenge of guiding him through his."