When fan favorite Teen Mom star Catelynn Lowell swaps vows with boyfriend of eight years Tyler Baltierra next year, she's sure to do it in high style.

"When I found my dress I just started bawling and knew it was it," Lowell, 20, tells Us Weekly of what she'll wear on her big day -- July 13, 2013 -- which falls two days before the July 15 anniversary of her first date with Baltierra, 20.

PHOTOS: Memorable A-list weddings

Setting the date for their "I dos" may have been easy, but picking a venue was much more of a challenge. "I wanted to get married in a castle," Baltierra explains. "It's different and unique. But Catelynn wanted a traditional church thing." So the couple compromised, and will swap vows at Olde World Canterbury Village, a 21-acre historical landmark in Lake Orion, Mich.

Says Baltierra, "There's a castle, but also an old barn that they turned into a chapel. It's a really majestic place." And after the parents to Carly, 3, exchange vows (which they'll write themselves), Lowell says, "everyone can literally walk from the chapel to our reception!"

VIDEO: Catelynn tells Us about her "emotional" bond with Carly

For much more on Lowell and Baltierra's upcoming nuptials -- including which Teen Mom stars they'll invite and if daughter Carly will be involved in the ceremony -- watch the video above now.

Teen Mom airs Tuesdays at 10 p.m. (EST) on MTV.

This article originally appeared on Usmagazine.com: Teen Mom's Catelynn & Tyler: All About Our Upcoming Wedding!