Hugely popular period drama
, should end after its seventh season, according to actor Allen Leech, who plays the role of Tom Branson on the show.
Four complete series of the TV drama have been aired so far. The fifth began airing in the UK on September 21, this year. It will begin airing in the US on January 4 2015, reported E! Online.
"In my heart of hearts, I can't see it going more than two more. I think the period of time we want to tell, we're coming to the end that us as actors can keep playing these characters," the 33-year-old actor said.
Leech, recalling a conversation with co-star Maggie Smith on the set of the show, said, "Maggie Smith turned to me on one of our last days of filming this season and said, 'I must be 196 years old by now. What's in the water here?' I said, 'I don't know, Maggie,' and she goes, 'It's ridiculous. I should have been dead years ago.'"