Tina Michelle O'Brien (born 7 August 1983 in Rusholme, Manchester England) is an English actress. She is best known for her role as a professional dancer in the BBC One dancing show Strictly Come Dancing since 2010, apart as Sarah Platt in the ITV soap Coronation Street from 1999 to 2007 and 2015 onwards, and her role as Bex Fisher in the BBC preschool drama sitcom Waterloo Road from 2010 to 2011.