While Hattie was at Cambridge, she met love of her life Blake Ritson. Blake Ritson is an actor and he is also famous for being a producer. After being in love with each other for about a decade, they are now engaged and promised to get married soon. Her nationality is English and she is of white ethnicity. She is five feet and eight inches in her height.
As a child, Hattie attended Frensham Heights School. After completing her higher secondary education, she wanted to join Newcastle University but her father pursued her to join New Hall, Cambridge. There she majored in English and she finally earned her Bachelor of Arts degree from there in 2000. There she also excelled in acting as she performed the role of Catherine in the play A View from the Bridge. She is also the director of this play. For this role, she won the most outstanding performance at the National Student Drama Festival. She has been active as an actress since the mid 1990s. In 1996, she was seen starring the role of Una Gwithian in the BBC show The Peacock Spring. In 2001, she played the role of Lucy in the play Love In A Wood. This show was performed in the RSC Swan Theatre. That year, she appeared in the plays like Hamlet and The Prisoner's Dilemma. In 2002, she starred in the short movie Too Close To The Bone. She got her rise in fame in 2008 after she portrayed the role of Gale Benson in a British crime film The Bank Job. She is also critically acclaimed for her role in The Bletchley Circle and Mr. Holmes. She is now aged 38 years old. Her net worth is in millions.