The jokes I used to do on 'Sex and the City' were always comic character things, and they were rarely hard jokes. As soon as you go up in front of people, it demands laughter.
In writing a series of stories about the same characters, plan the whole series in advance in some detail, to avoid contradictions and inconsistencies.
I was so flattered to be asked to be in the movies - the idea of being paid to act was heady stuff.

