Sally Pearson was born in Sydney and moved to Birdsville, Queensland when she was eight years old, before eventually settling on the Gold Coast. It was there, while she was still in primary school, that her athletic talents were noticed by Sharon Hannan, who coached her until 2013. Pearson rose to prominence in 2001, when at the age of only 14, she won the Australian Youth 100 m and 90 m hurdles titles. After injury setbacks during 2002 she made her international debut at the 2003 World Youth Championships in Sherbrooke, Canada and won gold in the 100 m hurdles. The following month, still only 16 years old, she represented Australia at open level at the 2003 World Championships in Paris, France as part of the 4 × 100 m relay team. In 2004, she won a bronze in the 100 m at the World Junior Championships, and just missed out on a medal in the 100 m hurdles.