 Moffat joked that " since I was a kid , I 've been thinking of Doctor Who monsters , just now when I do , it costs the art department [ … ] a lot of money " . To create the rigid structure of the angels ' dresses , prosthetics supervisors Rob Mayor soaked fabric in fibreglass resin , which was then painted over . Although they are never shown moving on screen , all of the Weeping Angels were played by actresses Aga Blonska and Elen Thomas wearing makeup and prosthetics . The actresses wore two distinct masks : one that was more docile looking , and one with fangs bared . Blonska later noted that " I 'm partly painted , partly glued into the costume , but it 's quite comfortable . " Although the actresses were slightly " wobbly " when they stood still , the producers used digital effects to , in essence , freeze the angels on film . Moffat was very pleased with the results , and called them " fantastic " . Mulligan later called the effects " so good " and " really creepy " . 
