They visisted Waterloo station, the Millennium Bridge and Westminster to help raise the show's profile.
The stunt was organised by Taylor Herring, which also released a survey of 2,000 people that shows 58 per cent of Brits are worried about the impact robots will have on society in the future and that 41 per cent think humanoids could destroy humanity.
Westworld, which is co-produced by Star Wars: The Force Awakens director JJ Abrams and stars Anthony Hopkins and Thandie Newton, is set at a futuristic theme park in which guests live out their fantasies without consequences.
Zai Bennett, director of Sky Atlantic, said: "AI and robotics are fast becoming part of everyday life, but our research demonstrates just how much we don’t know about this technology or where it could be heading. Sky Atlantic’s Westworld explores what life might be like if this became a reality. It looks at the future of AI – and the choices we make when we’re given free rein to live our lives without any consequences."