Chris Noth, aka Sex and the City’s Mr Big, will be making a West End debut of sorts tonight – he’s acting as emcee for An Evening with Ronnie Wood at the West End’s Ambasssadors Theatre. The Rolling Stone, and various other special guests, will be giving two performances of the one-off concert tonight, at 7.30pm and 10.30pm, with tickets ranging from £40 to £150 each. If you miss Noth there, keep your fingers crossed that producer Sally Humphreys can lure him back to tread the boards properly in a West End play. We hear that talks are under way – and we can certainly think of a few things we’d like to see Mr Big in…