It's A Girl!

With just a few months left in her pregnancy, details about Jamie Lynn Spears' first child are starting to slip out - like the fact that it's gonna be a girl!

Life & Style spoke to someone who claims to have overheard Lynne Spears discussing her baby's baby. According to the witness, Lynn was talking about how "Jamie Lynn and [Casey] were so excited when they found out it's a girl!"

The witness went on to reveal that although Casey's still "a bit nervous about having a daughter", Jamie Lynn was thrilled by the news and has already gotten to work picking out names. The teen queen might be passing on more than just her family name, too - she's apparently made a list of the names of all the girls on both sides of the Spears family and wants to incorporate one of them as her daughter's middle name!

(And naturally, Jamie Lynn made sure to include her mother's name for consideration - according to the witness, Lynne is "flattered" by her daughter's thoughtfulness!)

L&S also revealed that Jamie Lynn's been spending up a storm to get ready for her daughter's arrival, speaking to a Spears family insider who claims she's been buying "tons of clothes" and has plans to do her nursery in black, white, and yellow. She better hurry up, though - that same insider says the baby's due on June 29th!