Heidi Montag and Spencer Pratt's co-stars on The Hills have reportedly claimed that the couple's recent split was fake.
The two recently announced their separation, but several of their "friends" have cast doubt on the authenticity of their break-up.
Co-star Audrina Patridge told People.com: "I think it's a joke. I don't believe it. They're inseparable and in love."
Whitney Port, star of The City, added: "I doubt they're really broken up. I'm sure they're still sticking together."
Meanwhile, Hills star Lo Bosworth told the celebrity website that she believes the celebrity duo are using their "fake split" to try and keep themselves in the public eye following the end of the reality show.
She said: "I don't buy it. I've worked with them for too long, and they haven't been filming, so I think this is a way they think they can get back on the show for the last few episodes."