"Teen Mom OG" stars Catelynn Lowell and Tyler Baltierra had been dating since they were in seventh grade. The couple finally made their union official by getting married on Saturday, Aug. 22, in Charlevoix, Michigan.

The couple exchanged marriage vows in front of 154 guests on the beautiful property of a French Renaissance-style castle called Castle Farms. Lowell wore a traditional white lace wedding gown. Baltierra was dressed in a classic tuxedo.

"Teen Mom" cast members Amber Portwood, Maci Bookout and Kailyn Lowry were there to watch the couple exchange marriage vows, but someone from the "Teen Mom OG" cast was missing: Farrah Abraham.

Since MTV started production of "Teen Mom OG," Abraham has feuded with nearly everyone on the show: producers, co-stars, their boyfriends or baby daddies, and her mother. Radar Online reports that is the reason Abraham was not invited to Lowell and Baltierra's wedding.

An inside source told Radar Online, "[Farrah] has a tendency to make everything about her. If she had shown up, she would have created a spectacle."

In June 2014, Abraham started a feud with Lowell after she told Starcasm it made her "very sad" to see Lowell and Baltierra "make poor choices," referring to their second pregnancy.

Lowell and Abraham mended their broken relationship on "Couples Therapy" last summer, but the feud flared up again in March when the former porn actress retweeted several malicious remarks aimed at her costars.

One comment that Abraham retweeted on March 24 reads, "Technically @CatelynnLowell shouldn't have been on the show cuz she gave up her kid. Her dysfunctional mom & his dad was the show."

Baltierra responded immediately when he read Abraham's retweet. "Hiding your opinion through retweets does nothing but make me laugh even harder at the delusional state of your mind #NoRetweetNeeded," he wrote.

It was suitable that Abraham not be invited to the wedding considering she has also called Lowell "white trash" and described Bookout and Portwood as "fake."