And for the film, the producers managed to get practically all of the cast back together. One star in particular held out longer than anyone else to sign the dotted line – but for a good reason.
Gareth Neame, the film’s executive producer, revealed to Deadline it was Dame Maggie Smith who was the last person to sign up for the feature.
“I suspect in a lot of ways, Maggie missed working with the other actors,” he said. “When she was completely sure everyone was going to do it and it was happening, then she was on board.”
Star Hugh Bonneville added: “The biggest testament to the film is that everyone turned up to play. We had some hurdles getting everyone in the same place at the same time, but there was a will to do it.”
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Although the cast came back for the filming, not all of them actually made it into the final edit.
Having said that, creator Julian Fellows is already teasing a sequel, so maybe they will get their chance then?
Downton Abbey will be released on September 13 in the UK and on September 20 in the US.