Descending from a family of Portuguese doctors, Daniela was born in Boston, Massachusetts and lived in the US until she was 5. She attended St. Julian's School in Portugal, where she grew up, landing her first acting role at the age of 16. She kept working on diverse projects and finished high school. At the age of 18, Daniela moved to London, England to do a B.A. in Performing Arts at the London Metropolitan University, having finished with first class Honors. In 2007, she moved to New York to study at the "Lee Strasberg Theatre and Film Institute".

Since 2009, she has played the role of Special Agent Kensi Blye on the hit CBS show, NCIS Los Angeles.