The singer-and-guitarist and his wife Erin welcomed a daughter into the world in Los Angeles on Tuesday (09.08.11).
The baby weighed in at a healthy 7lbs 10z and the overjoyed couple have named her Emily Grace Stanley.
In a statement, Paul said: "Erin and I are once again blessed with the addition of Emily Grace to our family. I`m not sure she can sing but her first screams let me know she`s definitely daddy`s girl."
The 59-year-old musician and Erin already have two children, Colin, four, and two-year-old Brianna, together, while the `Rock and Roll All Nite` has 16-year-old son Evan from a previous relationship.
Despite his advancing years, Paul insists he has no difficulty keeping up with his young family.
He previously said: "I may be 59 but the only rocking chair this rocker is getting ready for is the one for my new baby."
The rocker recently completed a North American tour with KISS - which is also comprised of bass player and fellow original member Gene Simmons and guitarist Tommy Thayer and drummer Eric Singer - and the band are recording their 20th studio album this year.