Caroly Wilcox (1931–2021) was a Muppet builder and the workshop supervisor for Sesame Street, joining in 1969 as the show began and staying for decades.

The job was translation

Wilcox’s work very often meant converting Jim Henson’s sketches and ideas into practical puppets — figures that could be performed for hours, repaired between takes, and survive daily television production for years. That gap between a drawing and a working object is where most of puppet building actually lives, and it is almost never written about.

What she built

The Two-Headed Monster, the Yip-Yip Martians, and a great many of the monsters, horses, cows and camels that populate Sesame Street. On The Muppet Show, Mildred Huxtetter, Sopwith the Camel, Doglion and Betsy Bird. Elsewhere, Scred for Saturday Night Live’s Land of Gorch, Miss Finch for Follow That Bird, and Gobo Fraggle with Tim Miller.

Her 1979 sketch of a small red monster

eventually became Elmo.

The problem-solving

For Miss Piggy’s underwater sequence in The Great Muppet Caper, Wilcox developed a fabric that would work submerged. That is the shape of a workshop supervisor’s job — a production needs something that does not exist yet, and somebody has to make it exist by Thursday.

She performed too

, as one of the earliest puppeteers on Sesame Street, appearing as background monsters and assisting Henson with Ernie.

She was among the first women Henson hired as a builder

, alongside Jane Henson, and later served on the board of the Jim Henson Foundation.

For anyone building characters meant to last rather than to photograph well once, Wilcox is the relevant model.