KATIE NICHOLL: I'm tired of being given the brush off, says Sex and the City's Kristin Davis |

Sex And The City 2 premieres this week – but rumours of a third movie may be premature. I’m told that Kristin Davis, who plays Charlotte, has shocked her co-stars by failing to commit to a third instalment unless she is promised a bigger profile.‘Usually Kristin is the most cheery and enthusiastic leading cast member,’ says my well-placed source. ‘But she’s not committing until she sees a script