Sex and the City star  Sarah Jessica Parker is back in New York city filming “I Don’t Know How She Does It”  with “Mad Men” star Christina Hendricks. The costars were spotted this past Tuesday  in NYC getting to work on their latest project a book to movie release entitled  “I Don’t Know How She Does It”. The Best-selling book  was authored by Allison Pearson and  released in 2002.  The book is set around Kate Reddy, a fiercely ambitious and talented thirty-five-year-old hedge-fund manager at the London firm who has to deal with being a successful woman in a notoriously sexist business.

The “Mad Men” hottie and her “Sex and the City” co-star bundled up in between takes and looked to be thoroughly enjoying themselves, even out in the chilly Big Apple temperature.

In related news, despite rumors, Hendricks insists that her hit AMC show “Mad Men” will return for a fifth season.

She told press, “I know that there’s a season five and we generally go back around May/June. We’re just waiting for the word on when. I’m anxious to get back and see what happens with Joan and to work with all my friends.”