Brian Williams‘ daughter, Allison, is just one of the super-connected kids of notable New Yorkers working on Lena Dunham‘s HBO series “Girls.” David Mamet‘s daughter, Zosia, also stars in the show with Jemima Kirke, whose dad, Simon Kirke, played drums for Bad Company. Behind the camera, James Sehring, son of IFC Entertainment President Jonathan Sehring, works for producer Ilene Landress, and Mattie Siegal, niece of p.r. doyenne Peggy Siegal, just started as a production assistant.