The baby, weighing 7 pounds, 6 ounces and measuring 18 inches long, was born by C-section and Oy says that she will describe more about the experience in her blog next month.
“Brad and I are, of course, ecstatic she’s here and we are madly in love with her already. It’s truly unimaginable how quickly she wrapped us around her little finger!” von Oy, 35, told People.
Von Oy, who is married to Dell computer consultant Brad Bratcher, told him on their one-year anniversary that she was pregnant with their first child. She has kept fans updated on her pregnancy with occasional tweets, such as "My hands are so waterlogged from the heat, they double as an etch-a-sketch pad. #newwaystokeepyourselfoccupiedwhilepregnant."
Check out some more celebrities with their adorable offspring.
HuffPost Entertainment is your one-stop shop for celebrity news, hilarious late-night bits, industry and awards coverage and more — sent right to your inbox six days a week. Learn more