Having A Ball! Cressida Bonas Is Whirled Around The Dance Floor In An Elegant Period Dress As She Makes Her TV Debut In Lavish Costume Drama Doctor Thorne

Prince Harry's former girlfriend makes her television debut on Sunday with a role in ITV's Doctor Thorne, a three-part drama based on the 1858 novel by Anthony Trollope.

The new series has been adapted for the screen by Downton Abbey creator Julian Fellowes and quickly dubbed the 'new Downton'.