Michelle Dockery has created an alter ego to fool her fans.

The 32-year-old actress admitted she sometimes pretends to be ''rich Britney, from Beverly Hills'' when she is recognised in America for her role as Lady Mary in 'Downton Abbey', and insisted she isn't the only member of the cast to pull such a stunt.

She told Radio Times magazine: ''It's a silly spoof, but it passes the time. We're always sending ourselves up.''

While Michelle insists she finds it ''easy'' to accept strangers approaching her in the street, she admits she was initially ''nervous'' of the effects of fame.

She said: ''I find it quite easy to accept now, although at first I was nervous of complete strangers coming over and wanting to talk.

'''Sometimes they want selfies, and I've said no occasionally, although you don't have to be rude.

''There's a time and place....But there aren't many disadvantages to being in a show like this.''

Despite the global popularity of the period drama, it failed to win several awards at the Emmys last month, but Michelle insists she and her co-stars weren't upset.

She said: ''An audience is the main thing, not awards.''