This is very shady!

Nina Nina Ricci designer Olivier Theyskens flat-out lied to Sarah Jessica Parker.

The Sex & The City star wore his dress (above) to the New York premiere of the film this week and she and her stylist asked if anyone had ever wore the dress before and been photographed in it.

Theyskens assured Parker no on both accounts.

Well, he fucking lied - twice!

Throngs of paparazzi photographed Lindsay Lohan wearing that outfit a few months ago at a commercial shoot. And, making this even worse, socialite Lauren (Davis) Santo Domingo accompanied Olivier to the Met's Costume Institute Gala in May and was also photographed wearing that dress.

Parker spoke to The New York Times about the dress fiasco.

She says:

“In the big picture, this is not important, but there is a relationship between the entertainment industry and fashion. We’ve watched sales dwindle and we’ve watched people be less inclined to spend money on clothes.”

To Parker, these are reasons for companies to take particular care with their relationships. “Look, my affection for the dress hasn’t changed,” she said, “but what they did was so short-sighted. It’s just unethical and disappointing that they would allow the dress to be worn again.”

Parker says she remarked to Theyskens during the fitting that she was surprised the dress hadn’t been worn before. He assured her it hadn’t.

“He didn’t say, ‘Well, actually I just escorted Lauren down the red carpet at the Met.’ ” said Parker, adding, “I just wish it had been handled differently and they had been straight about it.”

Tisk tisk.

We're on team SJPeePee on this one.

Shame on you Olivier Theyskens and everyone at Nina Ricci.

We have a feeling she's not gonna be wearing any of your dresses ever again!

[Photo via Getty Images.]