The Harry Potter actress declared to Glamour that her life has been profoundly changed by the work of Girls creator Lena Dunham.
"I am literally obsessed with Lena Dunham. She's, like, my favourite person in the world," Watson quipped.
She went on to say: "I follow her on Twitter; I read her every day. And, yes, Girls is an example of something so refreshing because it feels real."
The HBO series is up for five Primetime Emmy Awards later this month, including 'Outstanding Comedy Series'.
Dunham recently offered a preview of Girls's second season, saying that the show is "entering sort of Battlestar Galactica territory" by casting Donald Glover as a "ship captain".
Girls kicks off its second season in 2013.
Watch a trailer for the series below: