10:14 AM PT -- Katie is in NYC to tape an episode of "Project Runway: All Stars."
We're told Katie will be a guest judge.
Katie Holmes finally surfaced in New York City today ... flanked by security ... and sporting the look of a woman who's unencumbered by marriage or religion.
It's the first time Katie has been seen in public since she filed for divorce from Tom Cruise last week.
According to reports, Tom is still in Iceland ... where he's been filming a movie.
TMZ broke the story, Katie is bailing from the marriage because she believes Tom wants to put 6-year-old Suri into a hardcore Scientology group known as Sea Org.