Theo James may be starring in one of the hottest movies of 2014 when “Divergent” hits theaters Firday (March 21), but TV watchers know him from something wildly different — as the late Mr. Pamuk from “Downton Abbey.”

His “Downton” character engaged in some sexy time with Lady Mary Crawley, only to wind up dead as a doornail in her bed. “S***, it must have been incredible sex for him to die midway through,” James cracks on “Chelsea Lately.”

He also jokes, “We did that method-style. Obviously not the death, but I said that I had to do it full-on and be there in the moment, in the castle, doing it full penetration.”

Woo woo. We wonder if he knows about the “Downton Abbey” porn parody?

“Divergent” opens Friday nationwide.