Joe Mantegna, who plays David Rossi in Criminal Minds, recently revealed that the first day of filming season 11 was awesome.

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The actor tweeted about getting back on set on July 8:

The CBS procedural's "set_report" Twitter page also posted images from the first day on set with Mantegna and Kirsten Vangsness, who portrays Penelope Garcia.

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Things seem to be moving swiftly with this chapter, the first table read for which took place on July 7.

The first pictures from the set of season 11 of Criminal Minds were posted on June 11.

In an interview, showrunner Erica Messer had teased the possibility of new guest stars and even bringing back old characters in season 11, while revealing that the writers begin work on the next chapter on June 1.

"Our season in the writers' room will begin June 1, so that's our work for the beginning of season 11," she said. "We have had a revolving door, and sometimes there might be fun in [bringing back someone] who's come in that door and say, 'Hey, do you want to come back and play for a little bit?' Which would be amazing because it's always a fun thing when shows get to bring people back. It takes a lot of us getting together and talking about what we've seen and what we need. It feels like there's nothing missing on our team. We've got such a great group. Our core group that everyone's known and loved for so many years cover all of our bases, so anything on top of it is like a bonus. This might be a good opportunity to bring in a fun guest star for a while and maybe shake it up a little bit."

Season 11 will premiere on Sept. 30.

The finale of Criminal Minds aired on May 6.

Watch the preview: