Donald George Sahlin (June 19, 1928 – February 19, 1978) was a Muppet designer and builder who worked for Jim Henson from 1962 to 1977. Muppets creator Jim Henson described Sahlin as “the man most responsible for the look of the Muppets.” Sahlin began making puppets at age 11, initially building a shadow theater and cardboard figurines. As an adult he built several puppets for Kukla, Fran and Ollie and created special effects sequences for films such as G.I. Blues and The Time Machine.