The 22-year-old aspiring country singer, who got engaged in March of last year, posted a picture of herself in the "I Do Bridal Couture" store holding her daughter in one hand and a big bag in the other.
"Finally found my perfect dress at @idobridalcouture !!!!! Thank y'all so much for making me feel so special and being so accommodating!!!!" she wrote.
While the pic doesn't show the dress itself, the store says that she picked a Lian Carlo gown and you can check out some of the designer's other styles here. Who knows, maybe one of these actually is Jamie Lynn's dress!
We're sure she looks absolutely gorgeous in whatever style she chose and we can't wait to see the photos from her big day!