The cast of Downton Abbey is saying goodbye.

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On Monday, Good Morning America released an interview with some of the actors who opened up on how emotional it was to film the final scene for the show. Michelle Dockery, who plays Lady Mary, mentioned that the farewell comments wouldn't stop and the process of having to finish really brought her down.

"I felt sick," Dockery said. "I just couldn't believe it was happening, but the goodbyes just kind of kept going. It was just the longest goodbye."

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Allen Leech then dished on how his character Branson is returning to the show. After spending time away, the guy will come back and hopefully realize that he's in the right place.

"The fact that I'm here means that he may make an appearance again," Leech said. "I think Downton is definitely Branson's home. So it's great that he's there for the final series."

Hugh Bonneville then mentioned that his character Robert Crawley might come out of his shell as the new season reflects on older times.

"He finds his place in the changing world of Downton Abbey eventually," Bonneville said. "But this final season has many of the favors of the very first season where we really got to know these characters first and everything seems to come back down into exploring those characters that we've loved."

Check out the interview below.

Downton Abbey Season 6 premieres in the United States on Sunday, January 3 on PBS.