Karl Adolph Gjellerup, Danish author and poet, Nobel Prize laureate (died 1919)

Karl Adolph Gjellerup was a Danish poet and novelist who together with his compatriot Henrik Pontoppidan won the Nobel Prize in Literature in 1917. He is associated with the Modern Breakthrough period of Scandinavian literature. He occasionally used the pseudonym Epigonos.

The Nobel Prize in Literature, here meaning for Literature, is a Swedish literature prize that is awarded annually, since 1901, to an author from any country who has, in the words of the will of Swedish industrialist Alfred Nobel, "in the field of literature, produced the most outstanding work in an idealistic direction". Though individual works are sometimes cited as being particularly noteworthy, the award is based on an author's body of work as a whole. The Swedish Academy decides who, if anyone, will receive the prize.