After graduating from Burlingame High School, she briefly lived in Japan in the fall of 2006, before returning home.
Hart attended the University of California, Berkeley Upon her graduation, Hart moved to Brooklyn, New York, to pursue a writing career.
The show quickly gained popularity through Tumblr and You Tube.
Within a few days the video had accumulated 100,000 hits.
She wrote a parody cookbook which was a New York Times bestseller for five weeks in August–September 2014.
She has an older sister named Naomi and a younger half-sister named Maggie.
The theme song for the tour, written by Hart, was accompanied by a video of fans jaunting in front of their favorite places. After receiving negative feedback from a minority of fans that complained about the lack of places at the meet-ups, Hannah uploaded a video called The Real Hello Harto on her main channel, giving her fans an exclusive look behind the screens of a regular day on the Hello Harto tour.
The video explained the work that goes into making content videos, as well shooting My Drunk Kitchen videos and meeting up with fans all over Canada and the United States.