Downton Abbey Stars Shares Behind-the-Scenes Secrets as They Say Goodbye After 15 Years (Exclusiv…

ET’s Nischelle Turner sends off the celebs of ‘Downton Abbey’ — Jim Carter (Mr. Carson), Allen Leech (Tom Branson), Laura Carmichael (Lady Edith) and Michelle Dockery (Lady Mary) — in type, as they reunite aboard one among London’s iconic double-decker buses to say goodbye to the beloved franchise after 15 years. ‘Downton Abbey: The Grand Finale’ is now in theaters.