Washington, Jun 17 American socialite Kim Kardashian has revealed that she played as an advisor to 'The Hills' star Heidi Pratt about posing for Playboy.

Pratt, 22, is yet to confirm that she will pose for the magazine, but Kardashian, 28, who was featured in the magazine's December 2007 issue, has told her to go ahead and do it.

"Actually, I was in Mexico and I got a call from Heidi saying, 'Call me right now'," Us magazine quoted Kardashian as telling MTV News.

"So I called her and she had said to me, 'What do you think? What's your opinion on if I were to do Playboy?'

"Go for it," Kardashian told her.

"I think that now's the time. I think it's a very classy magazine. It's artsy. I talked her through the whole process and helped her make up her mind," she said.

Kardashian said that Montag's hubby Spencer Pratt was also open to the idea of her posing for the magazine.

"Her and Spencer talked it over. They felt like it was the right thing for her to do and I'm anxious to see it," she added. (ANI)