Credit: Jean Baptiste Lacroix/WireImage; David Becker/Getty Images

Speidi at war!

Soon-to-be former spouses Heidi Montag and Spencer Pratt feuded over Twitter on Saturday as rumors grow about an alleged sex tape.

Pratt, 26,  told Friday that he is peddling an explicit video starring Montag, 23, who filed for divorce last month. (Porn impresario Steve Hirsch of Vivid Entertainment confirmed that he is speaking with Pratt about the flick.)

"Promises you the Citizen Kane of sex tapes. Honestly, Orson Wells makes a guest appearance," Pratt teased on Twitter on Saturday.  "Recommends you wait for the Special Edition Sex Tape. Blu-Ray, director's commentary, and bloopers!"

Montag, who hinted Friday she was "crying" over the scandal, finally shot back at her estranged hubby, Tweeting,  "F U!!!!!!!!!!!!!!!!!!!!!"

Pratt's reply: "Seriously? You're going to start shit on twitter?"

Earlier in the day, Montag was feeling more peaceful. "I want to live without fear," she wrote. "Life is short follow your dreams and spirit...Live like there is no tomorrow"

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Friends of Montag recently denied the existence of any tape to Radaronline.  The Hills couple's divorce is expected to be finalized on Valentine's Day 2011.