The 19th Duggar baby has arrived!

Michelle and Jim Bob Duggar welcomed a baby girl, Josie Brooklyn, on Thursday, a TLC rep tells

Josie Brooklyn -- who weighed 1 lb., 6 oz. -- was born at 6:27 p.m. at University of Arkansas for Medical Sciences, Arkansas, the rep tells Us.

The TLC rep previously told that "Michelle, who has been in the hospital recovering from a gallstone, was taken to the OR for an emergency c-section."

Michelle is resting comfortably and the baby is "stable" -- although she's in the neonatal intensive-care unit, the rep said.

"The most important thing right now is for Mom and baby Josie to get as much rest as possible," added the rep. "The family is grateful for all the prayers and well wishes during their recovery."

In September, Michelle and Jim Bob -- who have 18 children and one grandchild -- announced that they are expecting baby No. 19.