FOX Affiliates took over the Summer Television Critics Association (TCA) tour in July 22, 2002.
At the end of the day, the network threw a big party at Sky Bar, Mondrian Hotel, West Hollywood, CA. In attendance were Summer Glau and all the Firefly cast members but also Tiffani-Amber Thiessen, Paula Abdul, Simon Cowell or Dominic Purcell.
The event took place before Firefly first aired (in September 20, 2002), knowing that the filming for the pilot episode began on March 5, 2002.
Here's HQ photos of a young Summer Glau at Fox Network TCA party.