“Julian’s script charms, thrills and entertains, and in Brian Percival’s hands we aim to deliver everything that one would hope for as ‘Downton’ comes to the big screen,” Mr. Neame said in a statement.

Set among the backdrop of the family’s Edwardian English country home, the show’s 52 episodes revealed the nuances of an era in which the aristocracy defined life in England. The series won 15 Emmys and garnered 69 Emmy nominations; its finale drew about 9.6 million viewers. Audience numbers in Britain reached close to 12 million for several seasons.

The spirit of “Downton Abbey” has lived on in an exhibition in New York, in a Victorian-era building filled with 55 authentic costumes and props and sets from the show. There, fans can find the servants’ quarters, the lavish dining-room table and Crawley family portraits. The exhibition will be open through Sept. 3.

“When fans make their way through the exhibition, they are able to revisit the beloved characters they feel so close to,” Rachel Czwartacky, general manager of the exhibition, said in an email. “The film now offers a chance for fans to see what happens to their favorite family next.”

In the series finale, which featured happy endings for many of the characters, the iconic Violet Crawley, played by Maggie Smith, quips, “It makes me smile, the way every year, we drink to the future whatever it may bring.”