TMZ has learned ... Heidi Montag has officially called off her divorce from Spencer Pratt.
The two had been seen out in public together recently -- but yesterday, Montag made the reconciliation official, filing a motion for dismissal at L.A. County Superior Court. As we previously reported, Montag filed for divorce back in July -- citing irreconcilable differences.
But now, after the two reunited in Costa Rica to deal with a sex tape scandal -- it seems Heidi is once again on board with the whole "'til death do us part" thing.
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