Heidi and Spencer Pratt fabricated their split in a desperate attempt to stay famous as The Hills wraps up, the new issue of Us Weekly reports.
While Heidi's rep confirms the breakup to Us ("Heidi... hopes people respect her privacy"), sources say any estrangement is about as real as Heidi's size-F breasts.
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Adds another insider of the couple, who wed in April 2009, "Heidi and Spencer are laughing over it and having a blast."
Even Heidi's big sis, Holly, 26, twittered the couple are "liars."
Pal Jen Bunney -- who left the second season of The Hills after feuding with Lauren Conrad over Brody Jenner -- says she and Heidi, 23, are shopping a single-girls reality show.
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"They were waiting for The Hills to be over to split. Now she doesn't have to pretend," Bunney tells Us of the duo, who originally rejected a fake divorce plot-line on The Hills.
The two are in publicity-seeking panic mode. "This breakup is the latest part of Spencer's master plan," another insider says.
So could they get back together?
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"There are no plans for divorce," says a source close to the couple, and Heidi's rep confirms no papers have been filed.
And Bunney hints a reunion could happen on their show.
"That will be a big aspect of our show: How Spencer handles it," she tells Us.