Earlier today, production officially started on the highly-anticipated ABC pilot Marvel's S.H.I.E.L.D., with Marvel's The Avengers director Joss Whedon at the helm. Marvel Studios and ABC have also launched official Twitter and Facebook pages for the pilot. Take a look at the first official tweet sent from the Marvel's S.H.I.E.L.D. Twitter page.

Joss Whedon co-wrote the pilot script with Jed Whedon (@jedwhedon) and Maurissa Tancharoen (@MoTancharoen). Although Joss Whedon is not currently on Twitter, his co-creators have been tweeting throughout this first day of shooting.

The pilot stars Clark Gregg as Agent Coulson, Ming-Na as Agent Melinda May, Elizabeth Henstridge as Agent Gemma Simmons, Iain De Caestecker as Agent Leo Fitz, Brett Dalton as Agent Grant Ward, and Chloe Bennet as Skye.