Stephanie April "Steph" Twell (born 17 August 1989) is a British middle- and long-distance runner who competed at the 2008 Olympic Games in Beijing and the 2016 Olympic Games in Rio de Janeiro and trains at Aldershot, Farnham & District AC.
She won the 1500 metres at the 2008 World Junior Championships, and is a three-time winner of the European Junior Cross Country Championships (2006–2008), as well as being part of four winning Great Britain teams.
Representing Scotland, she won a bronze medal in the 1500 metres at the 2010 Commonwealth Games in New Delhi.
Twell is currently sponsored by sports company New Balance and was coached by one of the nation's leading endurance coaches, Mick Woods, for 19 years, from 1998 to 2017.
She is now coached by the father of Jake Wightman, Geoff Wightman.