Forget about polygamy, Big Love star Melora Walters is shedding a spouse – the actress has filed for divorce from her husband of two years, Alexander Vendler, RadarOnline.com has learned.

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According to court documents, Walters, who plays Bill Paxton’s deranged sister-in-law on HBO’s hit show about polygamy signed a prenuptial agreement with Vendler in June 2008.