Former Sex and the City guest star Kristen Johnston revealed that she was not sober while filming the show. “I was a hot mess,” Johnston, 58, said on the Wednesday, September 2, episode of the “Dear Chelsea” podcast, stressing she “never” used drugs or drank alcohol while on set. “I was just kind of messy, like late at night after I was doing a lot of theater. [There was] a lot of drinking after theater, lots of wine, the occasional foray into cocaine, but I knew what I was talking about. Let’s just put it that way.” Johnston appeared on SATC season 6, in which she portraye...