Report: Pratt shops Montag sex tape

LOS ANGELES, Aug. 21 (UPI) -- Spencer Pratt, soon-to-be ex-husband of U.S. reality celebrity Heidi Montag, is purportedly shopping around a sex tape of Montag, TMZ has learned.

Sources tell TMZ the proposed Heidi sex tape would have footage from both before and after she had multiple plastic surgeries.

Montag, star of "The Hills," has threatened to sue Pratt over a tell-all book, but has never mentioned a sex tape, TMZ said.

Pratt told a friend the purported tape "makes Kim Kardashian look like an amateur."