Today ABC’s president Paul Lee announced in a press release that a full season is ordered of Marvel’s Agents Of S.H.I.E.L.D.
“The series opened as TV’s highest-rated drama debut in nearly 4 years (since 11/03/09) and ranks as the No. 1 new show of the 2013-14 season among Adults 18-49 (4.0 Live + Same Day rating/5.7 Live + 3 Day rating). On average, ‘Marvel’s Agents of S.H.I.E.L.D.’ is No. 1 in its Tuesday, 8 o’clock time period, and has more than doubled the young adult delivery in the hour year-to-year (+150%),” the press release says about how well the show is doing, which is likely the main reason for the pick up.
Lead star Clark Gregg and actresses Ming-Na Wen, Elizabeth Henstridge, and Chloe Bennet responded on Twitter to the happy news, as evidenced in the tweets below:

We are overly excited to hear the great news that we can see much more of Agents Coulson, May, Ward, Fitz and Simmons and of course the mysterious and intriguing Skye.
Are you as happy as we are with the full season order?