Thandie Newton is a professional actor.
Melanie Thandiwe `` Thandie '' Newton ( [ ˈtændi ] born 6 November 1972 ) is an English actress . As of 2016 , she plays the sentient android , the madam Maeve Millay in the HBO science fiction-Western television series Westworld , which earned her a Critics ' Choice Award and Golden Globe and Screen Actors Guild Award nominations . She also portrayed DCI Roz Huntley in Series 4 of the BBC One police procedural series Line of Duty .