Description: On the 'Good Behavior,' Michelle Dockery plays Letty ... actress talks ‘Honeymooners’ and her many recurring TV roles. The former Lady Mary opens up to ET about playing Letty ...

It's been almost 10 years since the last series of Downton Abbey aired. The binge-worthy historical drama, set between 1912 and 1926, followed the lives of the Crawley family and their staff in ...