Former SEX AND THE CITY star Kristin Davis is hoping to toughen up her image after signing up for a hip new martial arts class.

The sexy brunette has become a fan of Budokon fighting and she insists it's helping her become a tough girl.

She says, "It's a combination of martial arts and yoga. You do yoga as a warm-up, then you do the kicks and punches."

Courteney Cox, David Arquette and Jennifer Aniston are among the celebrity fans of Budokon.