Pictures of Sarah Jessica Parker and Christina Hendricks on the Set of I Don't Know How She Does It in Boston

Sarah Jessica Parker and Christina Hendricks changed into matching Uggs between takes on the set of I Don't Know How She Does It in Boston earlier today. SJP has had lots of famous costars on set while shooting the film in addition to Vivienne Westwood spokesmodel Christina, like Jessica Szohr and Kelsey Grammer. SJP's doing double duty between her home life and work, spending time with her three kids and bouncing between two big-screen projects — she's one of the many actors with a role in Gary Marshall's New Year's Eve along with Halle Berry, Zac Efron, and Katherine Heigl. The follow-up to Valentine's Day may not be the only franchise SJP's involved with, as there is talk of a third installment of Sex and the City.