Jamie Lynn Spears is ready to say "I do!" She already has a handsome fiancé in Casey Aldridge, an adorable baby in Maddie and a new house. Now OK! can exclusively reveal that the former Zoey 101 star has already started planning her wedding, and that she and Casey will walk down the aisle together before the end of the year.

CLICK HERE for OK!’s exclusive gallery of Jamie Lynn & Maddie!

Despite their worldwide notoriety, the young couple won’t be swapping their vows at some 5-star celeb-filled resort, but will be sticking close to home. Jamie Lynn’s new house is in Liberty, Miss. — just 30 minutes from her mom Lynne Spears’ house, Serenity, in Kentwood, La. — and it sits on three acres, which is more than enough space to put up a tent for a private, late fall ceremony.

"She loves everything about the area where she lives. She’s not going to get married at some luxury resort in the Caribbean or a hotel in Beverly Hills," a friend of the bride-to-be tells OK!. "Her own backyard with just the people who matter most is more Jamie Lynn’s style."

And with the wedding approaching quickly, Jamie Lynn is planning to look her best on the big day. "She’s already down to her pre-pregnancy weight," says the friend. "She has the cutest figure!"

Of course, big sis Britney Spears will be her Jamie Lynn’s maid of honor, and Casey’s sister Ashlee will be one of her bridesmaids. And tiny toddler Maddie will be an integral part of the wedding — possibly in a basket decorated with flowers and carried into the ceremony by the bride and groom’s mothers.

For the complete, exclusive details — from the dress to the hair to the wedding bands — of Jamie Lynn’s wedding plans, pick up the new issue of OK! — on sale everywhere Thursday!

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