“Downton Abbey” Christmas special is going to be a tearjerker episode not only to fans but to the cast as well.

Radio Times noted that the cast remained tight-lipped about what will happen in the last ever episode. However, stars hinted that it is going to be a “heartfelt” and “compelling…tearjerker” finale.

Actor Jim Carter warned fans to buy a box of tissues ahead of the Christmas special, which is also the show’s final episode.

The 67-year-old actor, who plays Mr Carson, described the finale as a “tearjerker”.

Evening Standard quoted Carter saying in an interview with Good Morning Britain.

“Not only are we saying goodbye to each other as actors, we’re saying goodbye to the characters. I think the audience – well, have a box of Kleenex handy is all I can say. It’s going to be a tearjerker.”

Watch “Downton Abbey” finale trailer below

Dame Maggie Smith, who played Dowager Countess Lady Violet Crawley, buried her head in her hands as a speech was given in her honor during the filming of her final scenes, Mirror reported.

Smith portrayed the character for five years.

Lady Mary actress Michelle Dockery also can’t help but shed tears when reading the final script.

Mirror reported that some of the final scenes of the drama series were shot at Alnwick Castle in Northumberland, while others were shot at The Ritz in London. The two-hour holiday special was designed by creator Julian Fellowes.

According to The Telegraph, the show’s finale was actually set on New Year’s Eve 1925, and will see the return of Lady Rose, played by Lily James.

“Downton Abbey” season six finale is set to air on Friday (Dec. 25) at 8:45pm on ITV. In the U.S., Season 6 will premiere on January 3, 2016 on PBS, while the Christmas special will air on March 6.

Meanwhile, executive producer Gareth Neame admitted to Deadline that there have been some talks about making a big screen adaptation of “Downton Abbey.”

“We’ve had some conversations about it. Julian and I are keen. There is no script and no firm plan but it’s certainly something there is talk of. We’re not in denial about anything. We’ll know more next year,” Neame said.