The National Enquirer is reporting that Jamie Lynn Spears has already given birth to her new baby (a girl) earlier today (at approx. 8am CT) which was followed by a report from US Weekly also stating that JL gave birth … to a baby girl she named Maddie … here are the deets as reported by these two outlets:

From The National Enquirer: Jamie Lynn Spears has given birth to a girl, the NATIONAL ENQUIRER has learned exclusively! Jamie Lynn has entered Mississippi Southwest Regional Medical Center in McComb, Ms at 4 a.m. today and delivered via C-section at approximately 8:30 a.m. (CST) The baby weighed 6 pounds, 10 ounces. The father is Casey Aldridge. The 17-year-old Zoey 101 star had an ultrasound last week, indicating her baby may be in breech position. Jamie Lynn is currently resting in a recovery room.
From Us Weekly: Jamie Lynn Spears has given birth, a source tells Usmagazine.com. Daughter Maddie was born Thursday at Mississippi Southwest Regional Medical Center in McComb, Mississippi. Maddie weighed 7 lbs., 11 ounces. This is the first child for 17-year-old actress and her 19-year-old fiance Casey Aldridge, a pipe layer.
Wee! If true, much congrats to proud parents JL and Casey Aldridge and to the entire Spears/Aldridge family. I really hope that Maddie’s full name is Maddie May Spears — cuz that’s what I’m gonna call her irregardless of what her actual name may be ;) Ahhhhh … it’s a love day, ain’t? First we get new Beckham bulge pics and now a new member of the Spears family … the only thing left to make today totally killer would be the discovery of nude Jake Gyllenhaal pics. Woot!
UPDATE: People confirms that JL gave birth and named her daughter Maddie but reveal that her full name is Maddie Briann:
There is a new baby in the Spears clan! Jamie Lynn Spears and her fiancé Casey Aldridge welcomed a baby girl Thursday morning. PEOPLE confirms exclusively that the baby was named Maddie Briann. “Just the family was there,” says a source about the birth around 9:30 a.m. at a hospital in Mississippi, near her Louisiana hometown. “Everyone is healthy and happy.”
Meh. I like Maddie May better ;) Again, much congrats to all!!! And remember, we won’t be seeing what little Maddie Briann looks like (at least, officially) until her photospread comes out in OK! magazine (which was a deal that Mama Lynne Spears brokered with the mag when it was revealed that JL was pregs in the first place earlier this year).
[Photo credit: INFdaily; Source, Source, Source]