Heidi Montag and Spencer Pratt'The Hills' star Heidi Montag went to court today to file papers for legal separation from her estranged husband, Spencer Pratt.

TMZ.com reports that Montag listed "irreconcilable differences" as the cause for the split. She has yet to file for divorce, however.

The reality-TV starlet maintains that June 8 is the date of their split, meaning that all of her earnings from now on will be her own.

According to TMZ, Heidi does not have a lawyer.

Montag moved out of the home she shared with Pratt over a week ago. She plans to spend the summer filming a new show with friend Jen Bunney, also of 'Hills' fame.