The VH1 show features various celebrity couples receiving "intense counselling" in an attempt to improve their relationships.
Former Real Housewives of New York star McCord has now signed up for the series with her husband Simon Van Kempen, according to TMZ.
The Bachelor's Lamas and her husband Nik Richie - who married in Las Vegas in 2010 and welcomed a baby girl last year - have also reportedly joined the cast.
R&B singer JoJo and rapper Too $hort are among the other names rumoured to be appearing in the new season of Couples Therapy.
The reports come shortly after speculation that Doug Hutchison and his wife Courtney Stodden will be starring in the show this season. The couple caused controversy when they wed last year as Stodden was only 16 at the time.