She's set to wed before the year's end.

New momma Jamie Lynn Spears has begun planning her wedding with fiance Casey Aldridge -- nuptials that will take place before the year is out, OK! magazine reports.

The couple, who recently became parents to an adorable baby girl, Maddie, will exchange "I do's" in characteristically down-home fashion, likely at Jamie Lynn's new three-acre property in Libery, Miss., sometime in late fall, according to the mag.

"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 "Zoey 101" actress tells OK!. "Her own backyard with just the people who matter most is more Jamie Lynn's style."

Ready to walk down the aisle in style, the 17-year-old mom is "already down to her pre-pregnancy weight," says her friend, adding: "She has the cutest figure!"

According to the mag, baby Maddie will be a focal point of the wedding, perhaps even taking in the nuptials from "a basket decorated with flowers and carried into the ceremony by the bride and groom's mothers." And speaking of family, sis' Britney will be Jamie Lynn's maid of honor, while Casey's sister Ashlee will serve as one of the bridesmaids.

For more details on the big day, check out the latest issue of OK!, on sale Thursday.