Williams started playing rugby for Jogalanga Women, a club founded by her father, in 1999.[4] When she was 16, she was invited to Border Bulldogs trials and was selected for the team to play in the women's Currie Cup.[2] Shortly afterwards she made her international debut for South Africa in 2004.[4] In 2006, she was awarded the South African Rugby Union's Women's player of the year award[5] after playing in South Africa's first women's World Cup campaign at the 2006 Women's Rugby World Cup.[2]