Showbiz
The reality TV star spoke out about his partner's photographs in the adult publication at last week's G.I. Joe Hollywood premiere.
"[The photos are] beautiful art," he told Access Hollywood. "Not, like, Picasso art - real beautiful art, you know what I'm saying?
"[Playboy] kind of had a vision... and we brought in Matthew Rolston, who is a very well-known, amazing photographer. So, it's more art."
The Hills star poses for the cover in a bikini with the Playboy bunny logo tanned on her stomach.
Speaking about Montag's figure, Pratt added: "See her powerful curves. They are powerful! It's an honour. I feel like I did something great, like I should get a trophy!"
Montag's Playboy issue is published on August 14.
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