Jones was born on 21 July 1988, in London, England. Hatty made her feature film debut at the age of nine playing the title role, which was based on the children's book series by Ludwig Bemelmans. She was picked among thousands of applicants in a casting search, which was looking for the girl with "the right height and charm for the role".
Hatty later trained at Mountview Academy of Theatre Arts graduating in July 2010. At drama school she was cast in a number of roles including Juliet in Romeo and Juliet and Nina in The Seagull. She recently appeared in There Will Be More by Edward Bond at The Cock Tavern Theatre in Kilburn North London, and in Hotel Confessions at The Southwark Playhouse.
In 2014 Jones released a webseries on YouTube entitled Offstage. Filmed in and around Hatty's home at Muswell Hill, the videos chronicle the lives of young adult actors, played by Hatty and Amani Zardoe, as they struggle at making a name for themselves in the acting industry.