Étienne Delessert (born 4 January 1941 in Lausanne – died 21 April 2024 in Lakeville) was a Swiss self-taught graphic artist and illustrator[1].

He is largely known for his animated series Yok-Yok and his collaboration with Eugène Ionesco, on Stories "1" and "2"[2], as well as his work with child psychologist Jean Piaget.

[3] His work focused on expanding the child's mind through the use of strange stories often designed to make children ask questions.

For his lasting contribution as a children's illustrator, Delessert was a finalist for the biennial, international Hans Christian Andersen Award in both 2006 and 2010.

Additionally, in 1973 Delessert illustrated a children's book based on the lyrics to "Being Green", a popular song written by Joe Raposo, originally performed by Jim Henson as Kermit the Frog on both Sesame Street and The Muppet Show.