Diana Hayden was born in Hyderabad, Andhra Pradesh, India, in a Anglo-Indian Christian family. She attended St. Ann's High School in Hyderabad. She has BA degree in English from Osmania University, Hyderabad. She studied Acting and Drama at the Royal Academy of Dramatic Arts, London, UK. She starred in the Bollywood movie "Ab Bass" and Hindi TV Serial "Big-Boss". Before she began modeling, she worked for an event management company called Encore. She then worked as a Public Relations Officer at BMG Crescendo, where she assisted in managing the careers of models Anaida and Mehnaz. On Anaida's recommendation she entered herself into the Miss India contest in 1997.