Spencer Pratt and Heidi Montag Spencer Pratt and Heidi Montag

Always one to take advantage of the spotlight, Heidi Pratt debuted her September Playboy cover at Thursday's G.I. Joe: The Rise of the Cobra premiere, where her husband, Spencer, proudly admired his wife's (photo) spread.

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The duo didn't give photographers a peek of the inside shots, but the cover displays Heidi, who appears to be coated with mud, in a white bikini with a Playboy bunny sketched out on her midsection.The Pratts declined to comment on the issue, but frenemy Lauren Conrad has no problem voicing her opinion. Referencing Heidi's cosmetic enhancements, the ex-Hills star recently quipped, "They're not going to pay for themselves."What do you think of Heidi's cover?