Sarah Jessica Parker may not know if a Sex and the City 3 will ever hit theaters, but MTV's Josh Horowitz got his hands on a "leaked" script for the film and asked SJP and her co-star Greg Kinnear to act it out!

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While SJP and Greg were promoting their new film, I Don't Know How She Does It, Josh asked the SATC star to discuss the potential third film.

“We don’t [know],” Sarah said with laugh to MTV. “But if you do, please do let me know!”

So instead, Josh pulled out a "top secret" page from the script and had had SJP and Greg read parts for his web series, "Leakage."

Sarah was playing Carrie, Greg playing a man named Rex and Josh was reading for Samantha — naturally.

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Apparently, Josh's script has the ladies caught in a "time vortex" — much like Back to the Future Part III.

"It was a very important film in my childhood," Josh explained.

Watch the hilarious video over at MTV.com!