A fourth season of "Marriage Boot Camp" is reportedly underway. WE TV has selected a new cast of couples from popular reality shows on various networks to join the series. The mix is surprising, to say the least. 

According to Us Weekly, fans of the show, which aims to mend troubled relationships through therapy and various exercises, can expect to see a lot of familiar faces in the upcoming season. Sean and Catherine Lowe (née Giudici), who met during Season 17 of "The Bachelor," will appear in Season 4 alongside "Here Comes Honey Boo Boo" stars Mama June Shannon and Mike "Sugar Bear" Thompson, and "Love & Hip Hop Atlanta" couple Benzino and Althea Eaton. Sources say the diverse cast is currently filming. It has not yet been revealed which other couples will be joining them.

While Us' source did not give each couple's reasons for coming on the show, previous reports may provide clues to the struggles some of the "Marriage Boot Camp" pairs may be dealing with. Mama June and Sugar Bear's relationship has had its ups and downs. The couple split briefly in 2014 after the "Honey Boo Boo" matriarch discovered that her beau had been chatting with various women online. Not long after their split it was believed that Mama June was working things out with her ex, Mark McDaniel, who served 10 years in a federal prison on child molestation charges.

Benzino and Althea's relationship issues also have played out in the public eye. Rumors that the couple had split began swirling after Althea posted some confusing images on her Instagram page. Benzino quickly shut down those rumors, however, with an Instagram post of his own directly addressing sites that had reported he and his lady were no longer a couple. 

Meanwhile, Sean and Catherine Lowe's addition to the series is a head scratcher. The couple wed on Jan. 26, 2014, and haven't been vocal about any relationship issues they may be having.

Although the forthcoming season is said to be in production, Season 3 of "Marriage Boot Camp" is still on the air. The show airs Fridays at 9 p.m. EDT on WE TV.