The Office wrapped filming a month ago, but Ellie Kemper is already waxing nostalgic for a certain co-worker. My St. Louis buddy revealed whose face she misses seeing most on a regular basis—and gave us deets on that new pilot of hers (which we're already obsessed with!)—when we caught up at the US Weekly Hot Hollywood Style party! Glamour: Who do you miss most from The Office? Ellie Kemper: I missed seeing Mindy [Kaling] for a while, but from the regular cast I miss seeing Phyllis [Smith]…