Best news ever to end your work day with: The cast of Arrested Development has officially begun filming for the fourth season. Rejoice! Celebrate! Take to your respective Tumblrs and spread the news! There's pictorial proof up there, in case you needed assurance that all the cast members would be returning, along with the show's production team. Oh Arrested Development, never leave us again.
If you don't already have it marked on your phone calendars or whatever, the production of the series will extend through the Fall, and the ten episodes which comprise season four will be released on Netflix sometime in early 2013.