One of the earliest clay animation films was Modelling Extraordinary, which dazzled audiences in 1912. December 1916 brought the first of Willie Hopkins' 54 episodes of "Miracles in Mud" to the big screen. Also in December 1916, the first woman animator, Helena Smith Dayton, began experimenting with clay stop motion. She would release her first film in 1917, an adaptation of William Shakespeare's Romeo and Juliet.
In the turn of the century, there was another well known animator known as Willis O' Brien (known by others as O'bie). His work on The Lost World from 1925 is known, but he is most admired for his work on King Kong, a milestone of his films