Jenelle Evans' father won't be walking her down the aisle.

Weeks after the Teen Mom 2 star released her new memoir, Read Between the Lines: From the Diary of a Teenage Mom, which revealed that she was no longer in touch with her biological father, Evans has revealed that her oldest son, eight-year-old Jace, will walk her down the aisle on September 23 when she and David Eason tie the knot.

“He is so excited,” Evans revealed to Life & Style on September 6. “He wants to wear his suit tomorrow!”

Evans and Eason became engaged in February and ever since, the couple has been planning for a super casual wedding.

“I even told guys, ‘Come in jeans and button-downs.’ I don’t care,” she explained. “It’s going to be laid-back, with buffet-style food and only close friends and family.”

While Evans' three children, including Jace and her youngest kids, three-year-old Kaiser and seven-month-old Ensley, will be included in the upcoming event, as will Eason's oldest child, daughter Maryssa, Evans' mother, Barbara, was left off the guest list.

“She really crushed our relationship... Maybe I’ll forgive her someday, but just not right now,” she said.

As fans will recall, Evans and her mother attended a court hearing in May where Barbara was awarded with full custody of Jace. In turn, Evans accused her mother of refusing to give her son back to her and the women have been estranged ever since.

To see more of Jenelle Evans, her family, and her co-stars, including Leah Messer, Kailyn Lowry, Chelsea Houska, and Briana DeJesus, tune into new episodes of the eighth season of Teen Mom 2 on Monday nights at 9 p.m. on MTV.