June 29 (UPI) -- The first trailer for the third and final Downton Abbey movie is expected to drop online Monday. "It all leads here. The new trailer for Downton Abbey: The Grand Finale arrives tomorrow," a post on the franchise's X feed said Sunday.

The Grand Finale trailer for the upcoming period drama, which serves as the final installment to the film franchise based on Julian Fellowes’ acclaimed TV show. The movie is slated to make its debut in theaters on September 12,