Couple's Therapy

"Teen Mom" stars Catelynn Lowell and fiancé Tyler Baltierra might not be getting married as soon as you think ... TMZ has learned the duo has joined the new season of "Couples Therapy."

Catelynn and Tyler -- who infamously put their "Teen Mom" kid up for adoption back in 2008 -- have been on and off for over seven years -- but were reportedly set to tie the knot in Michigan in a few months.

Now, sources tell us, Catelynn and Tyler will hash out their problems on the Vh1 show ... about couples whose relationships are floundering.

We're told rapper Chingy, Flavor Flav and Joe Francis have also joined the cast ... with their current significant others.

17-year-old Courtney Stodden's 52-year-old husband is a "child molester" -- at least that's what one his "Couples Therapy" co-stars called him on set last week ... and it's creating massive tensions among the cast.

The show began filming last week -- and sources tell TMZ, when Courtney's husband Doug Hutchison introduced himself to TheDirty.com's Nik Richie ... Richie refused to shake his hand.

According to sources, Richie then called the guy a "child molester" and refused to say another word to him.

We're told Doug was deeply offended by the remark and has been extremely upset since. The standoff has created a rift among the cast.

FYI -- Doug married Courtney in Vegas last year ... when she was just 16. Courtney's mother had to sign a consent form permitting the marriage because Courtney was under 18 at the time.

Former "Real Housewives of New York" stars Alex McCord and Simon Van Kempen claim they're on the verge of a nasty split -- so they've decided to hash out their issues on a VH1 reality show for troubled couples.

Sources close to the production of "Couples Therapy" tell TMZ, Alex and Simon will be starring on the upcoming season of the show -- alongside 17-year-old Courtney Stodden and her 52-year-old husband Doug Hutchison.

In addition to those two couples -- we're told R&B singer JoJo (From K-Ci & JoJo) will be appearing with his wife, as well as TheDirty.com blogger Nik Richie and his "Bachelor" star wife Shayne Lamas.

Rapper Too $hort will also be on the show with his 15-year on-again-off-again girlfriend Monica Payne.

As we reported, each couple will be getting "intense counseling" while on the show -- which began taping a few days ago.

Here's a shocker ... 17-year-old Courtney Stodden believes there are MAJOR PROBLEMS with her marriage to 52-year-old "Lost" actor Doug Hutchison ... and now she hopes they can be solved on a VH1 reality show.

TMZ has learned ... Stodden -- who married Hutchison when she was 16 -- has signed on to the upcoming season of VH1's "Couples Therapy."

Sources connected to production tell us ... the couple has acknowledged there are "obvious problems in their relationship because of their age difference and the notoriety they've gotten because of their relationship."