Place of birth: Cambridge, England.
Residence: Bath, England
No previous Olympic results:
Career achievements: Silver medallist, 2009 World Championships, individual
Williams's gold medal in Vancouver was Britain's first in an individual Olympic winter event since 1980.
She was cleared to race for gold after an American appeal against the shape of her crash helmet was thrown out by organisers. The US team accused Williams of having illegal aerodynamic features on her helmet.
She took up skeleton in 2002 in Lillehammer, Norway and made her debut for Britain the following year. She was attracted to the sport after winning the guest category at the world push start championships.
The 27-year-old, nicknamed "Curly Wurly" because of her curly hair, had been a 400m runner before switching to skeleton.