The Crawleys are never more than a text away from one another in real life. "It definitely is more active when we're filming, then leading up to promoting it, there's a flurry," adds Dockery, 43. "But ...

The 'Downton Abbey: The Grand Finale' actress also tells PEOPLE who in the cast is "the leader" who "arranges ... any kind of social thing" among them The Crawleys are never more than a text away from ...