One of the stars of Downton Abbey explained why it's a good idea to let the show run its course after the sixth season.

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On Wednesday, BBC shared an interview with Hugh Bonneville, who plays Robert Crawley on the series. He mentioned that the British drama could have been "squeezed out" for more seasons, but he thinks creator Julian Fellowes "would have run out of ideas."

Speaking at a Bafta event, Bonneville opened up on how thankful he is to work with someone as talented as Fellowes who is more than likely doing the right thing by letting the series finish up.

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"We've been blessed by having a writer who's got a fund of stories to play with, and these characters that have been fully-formed over the last six years," the actor said. "To have extended it would have been, I think, a bit of a misstep."

Bonneville continued by saying it would have been a mistake to have the show get to a point when audiences don't care to see it go.

"I think you want to finish when people are still a little bit sorry that it's over," he said. "You don't want to wait until it's a huge relief all round so we decided at [series] six people would be sorry there wasn't a [series] seven and that seemed right."

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