TMZ spoke with a rep from TLC who told us, "Michelle, who has been in the hospital recovering from a gallstone, was taken to the OR for an emergency c-section."
At 6:27 PM, Michelle and Jim Bob welcomed their new daughter, Josie Brooklyn ... who weighed in at 1lb., 6 oz.
We're told Michelle is resting comfortably and the baby is "stable" -- although she's in the neonatal intensive-care unit at the University of Arkansas for Medical Sciences.
The rep added, "The most important thing right now is for Mom and baby Josie to get as much rest as possible. The family is grateful for all the prayers and well wishes during their recovery."