Knud Nellemose received two Honorable Mentions for his works Young Man with Discus (Bronze) and Head of a Boxer (Granite) at the 1948 London Olympics within the Art Competitions in the category Sculpturing, Statues. He was a prolific Danish sculptor who is remembered for his figures of sportsmen and his statues of famous Danes. Nellemose began his career as a cartoonist and sports journalist. As a sculptor, he was known for his naturalistic human figures and portrait busts, often in motion, and sculpted numerous athletes, often with strong emotion, both in small and large formats, mostly in stone and bronze.
During World War II, Nellemose was a member of the Danish resistance group. Therefore, he later received many commissions for war memorials. He also used photographs as templates to represent prisoners from concentration camps in his sculptures. His sister, Karin (1905–93) was a well-known actress, figuring in many stage productions and films.