Downton Abbey was a popular series, and several actors and actresses got their start on it and became famous after appearing on the show.
But a few former Downton Abbey actors really struck it big in movies and TV, becoming household names thanks to Disney and Game of Thrones.
James joined Downton Abbey late in season 3 as the Crawleys' irrepressible cousin, Lady Rose MacClare.
However, James returned for the Downton Abbey series finale although she won't be reprising Lady Rose in the Downton Abbey movie.
Related: Why Lily James Left Downton Abbey ( Why She's Not In The Movie) Dan Stevens Dan Stevens starred as Matthew Crawley in Downton Abbey seasons 1-3.
But after three years on Downton Abbey, Stevens grew restless in the role and he was wary of being typecast as virtuous Matthew Crawley after the show turned into a worldwide smash.
Iain Glen Iain Glen already boasted dozens of movie and TV roles and before Downton Abbey, the Scottish actor was famous for playing the villainous Dr. Alexander Isaacs in the Resident Evil movies.