"Lisa and I are thrilled to be welcoming our fourth child into the world," Valastro, 33, who is dad to Sofia, 7, Buddy, 6, and Marco, 3, tells PEOPLE. "Our three children are looking forward to adding a new brother or sister."
The pregnancy will be a storyline on the latest season of Cake Boss, airing Mondays at 9 p.m.
And there will be no rest for the weary dad, and owner of Carlo's Bakery in Hoboken, N.J. He'll be promoting his new TLC competition series, The Next Great Baker, in December, and has a new book, Cake Boss: Stories and Recipes from Mia Famiglia hitting shelves in November.