From Wikipedia, the free encyclopedia Amanda Billing (born 12 April 1976 in New Zealand) is a New Zealand actress best known for her role as Doctor Sarah Potts on New Zealand soap opera Shortland Street. Billing grew up in Masterton, and spent her university years in Christchurch. After graduating with a Bachelor of Arts with 1st Class Honours in Geography from the University of Canterbury, she trained at the Christchurch College of Education and became a high school teacher. Billing was invo ...