Donna Alexander was born 16th April, 1965 in Manchester of a Jamaican mother and part Norwegian/part Welsh father. After leaving school she gained qualifications as a secretary and then worked in various jobs including a barmaid and a placement officer. After a period living in Jamaica she returned to the UK determined to become an actress and joined the Arden School of Theatre. On stage she has appeared in All's Well That Ends Well and The Love of a Nightingale while on television she had parts in Miami Vice, The Bill, Hetty Wainthropp Investigates, Go Back Out the Way You Came In, Clocking Off and The Ghost Squad.
She remains best known for her role of Penny Hutchens in Casualty, a part she played between 1997 and 2001. Four years later, from March to April 2005 she appeared in Coronation Street as DS Kristen Smith who investigated the death of Tommy Harris.