Consider Heidi Montag and Spencer Pratt's The Hills co-stars among those who feel their recent separation isn't real.

"I think it's a joke," Audrina Patridge told People at the MTV Movie Awards on Sunday. "I don't believe it. They're inseparable and in love."

Montag -- who wed Pratt in April 2009 -- moved out of the Pacific Palisades, CA home she shared with him late last month, but hasn't filed for divorce. Instead, she stated the couple is "working on things" and she "just needed some space."

"I doubt they're really broken up," former The Hills and current The City star Whitney Port told People. "I'm sure they're still sticking together."

Lauren "Lo" Bosworth agrees with multiple sources who have recently claimed that Montag and Pratt's split is a publicity stunt because The Hills is currently in the midst of airing its final season and the couple has no new projects on the horizon.

"I don't buy it," she told People.

"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."

The Hills sixth and final season currently airs Tuesdays at 10PM ET/PT on MTV.