"Mad Men" season 7 is the final season for the popular AMC show, and now Christina Hendricks, who plays Joan Harris, reveals some spoilers and how she feels about saying goodbye to "Mad Men."

The biggest spoiler Christina Hendricks revealed? No one really knows how "Mad Men" season 7 will end.

"We're about to start filming the third episode and, honestly, no one knows where it's going to end," Christina Hendricks told The Star, Fashion & Style reports.

Hendricks plays secretary-turned-partner Joan Harris in "Mad Men." She added about season 7: "It's crazy, it's mad, it's just what you'd expect it to be. Every time a new script arrives we just fall on it and tear it apart looking for clues as to where our characters are going to wind up."

Hendricks admitted that she'll miss the characters she's grown to know in the last eight years of "Mad Men," especially for Joan and Roger Sterling's on-again, off-again romance, Fashion & Style reports.

"Joan, of course, I'll miss her. And Roger. How can I not miss him after all we've been through," she said.

"Don Draper? He made a habit out of behaving badly from day one and everyone thought it was so attractive and sexy and wanted to be like him. Now that his life seems to be falling apart, I don't think anyone wants to emulate him anymore."

Hendricks also talked about AMC's decision to break up the final season of "Mad Men" into two parts; half of season 7 will premiere in spring 2014 and half in spring 2015.

"I know it can be a bit frustrating to me as an actor, because I would just like to keep going. But our writers really put their blood and guts into the scripts, and they need the time off to regroup and recuperate," she said.

The final and seventh season of "Mad Men" will premiere next spring on AMC.