Hannah Louise Spearritt (born 1 April 1981) is an English actress and singer. She portrayed Mercedes Christie on Casualty from January to May 2016. She said that she took up a semi-regular guest role, which hinted that she would be in more episodes than other recurring guest characters but in less than the main cast.
She is best known for being a member of S Club 7 and her appearance in the 2004 spy spoof film Agent Cody Banks 2: Destination London as Agent Emily Somners and as Abbey Maitland in the ITV Science Fiction Adventure series Primeval. Her former S Club 7 bandmate Jon Lee appeared as Craig Robbins in the series 24 episode "Mum's the Word".