Heidi Montag Files for Legal Separation

TMZ has learned Heidi Montag just showed up at the Santa Monica Courthouse and officially filed for legal separation from Spencer Pratt. She lists irreconcilable differences as the reason for separation.

Heidi did not file divorce papers. The legal significance of legal separation is that her earnings will become her separate property from the date of separation. Heidi lists the date of separation as today, June 8.

Interesting ... under the section, "community assets and debts," Heidi wrote, "No such assets or debts." It's unclear if Heidi and Spencer have a prenup which keeps their assets separate, or if they're broke.