Alex Kingston is TV royalty, celebrating 45 years in the business, from her debut in Grange Hill in 1980 to the title role (and BAFTA nomination) in The Fortunes and Misfortunes of Moll Flanders, starring in over 150 ER episodes and becoming part of Doctor Who folklore as River Song. Her appearance in Doctor Who was meant to be a one-off but she became a regular and remains a fan favourite.