Sarah Harding (b. November 17, 1981) is a singer in the all-girl group Girls Aloud from Stockport, England. Before joining Girls Aloud she did some vocals for Project G on some unreleased tracks.

Whilst working as a waitress and barmaid in Manchester, she entered the UK talent-search show Popstars: The Rivals, and was picked as the final member of the five-piece group, Girls Aloud, that formed the female half of the eponymous 'rivals'.

Earlier in the year she had also entered FHM's 'High Street Honeys', the magazine's version of a national beauty contest, and her pictures appeared in the first Top 100. She withdrew upon achieving success on Popstars. A year later she was voted one of the Top 30 sexiest women in the world by readers of the same magazine. In 2005, she entered the Top 10 at #8.

On September 10, 2005, Sarah was one of the celebrity bridesmaids for Jordan's wedding to Peter Andre in Berkshire.