The Sex and the City star stripped down to a tiny white towel to accept her nomination to be drenched in iced water, while apparently standing on a hotel balcony, in sight of fans below.
"My name is Sarah Jessica Parker and I'm in Houston, Texas," the actress announced in the first of three Instagram videos. "I was nominated by Jenny Gersten to take the ALS Ice Bucket Challenge. No problem," she said bravely.
"In turn, I nominate Joan Rivers, Kim Kardashian and Billy Eichner. You have 24 hours to accept this challenge,” the actress said triumphantly in her second video.
Finally, Parker braced herself for the freezing water yelling at her friend to "dump it on me!" The slender actress screamed as the water hit her skin, to the sound of cheers from the fans below.
For her part, Kardashian is sure to be delighted by her nomination. Last year, reports surfaced that the reality TV star was "obsessed" with Parker, hiring her publicist and coveting her style.
And Kardashian was thrilled back in February when she got to hang out with Parker and fellow nominee Joan Rivers backstage at Jimmy Fallon's Tonight Show premiere.
Click on the video above to watch SJP get drenched!