Sophie Margaret Christiansen is an English former equestrian who competed in four successive Paralympic Games. In 2012 and 2016 she gained three gold medals at the Paralympics. In 2008 she won two gold medals and a silver at the Beijing Paralympics whilst studying for a master's degree in mathematics at Royal Holloway, University of London. She works as a software developer at investment bank Goldman Sachs and as a disability campaigner. She qualified for the postponed 2020 Summer Paralympics but had to drop out due to her horse not being fit.