She first hit screens in soaps and well known series like Coronation Street, The Bill, Bad Girls and dinnerladies. From there she moved onto films and gained worldwide recognition for her role as Anna in acclaimed TV drama Downton Abbey. Joanne returns to the small screen this evening in series two of ITV series Liar - look back through her career with these 16 photos.
5. Moet British Independent Film Awards
Joanne won Most Promising Newcomer for her role in British drama film In Our Name in which she played a female soldier who has returned from serving in Iraq.
6. Downton Abbey
Her performance in the show earned two Emmy nominations in 2012 and 2014. Photo: ITV/Carnival Films
7. Downton Abbey
In 2010 she was cast in Downton Abbey as Anna, lady's maid to Lady Mary Crawley. Photo: ITV/ Carnival Films/ Nick Briggs
8. A Street Cat Named Bob
Joanne at the UK premiere of A Street Cat Named Bob in 2016 in which she played Val. Photo: Getty Images/ Jeff Spicer