Darby Costello studied astrology in the 1960s in Boston. After living in Africa 12 years, she moved to London and in 1988 began teaching at the Centre for Psychological Astrology, where she became Head Tutor. She teaches at several international astrology schools, writes books, does charts, and lectures in many countries. In 2006, she received her M.A. in Cultural Astronomy and Astrology. In 2013, she received the Charles Harvey Award for Exceptional Service to Astrology.