Theodor Severin Kittelsen (27 April 1857 – 21 January 1914) was a Norwegian artist. He is one of the most popular artists in Norway. Kittelsen became famous for his nature paintings, as well as for his illustrations of fairy tales and legends, especially of trolls.

Kittelsen was born in the coastal town of Kragerø in Telemark county, Norway. His father died when he was young, leaving a wife and eight children in difficult circumstances. Theodor was only 11 years old when he was apprenticed to a watchmaker.

When at the age of 17 his talent was discovered by Diderich Maria Aall, he became a pupil at Wilhelm von Hanno’s drawing school in Christiania (now Oslo). Because of generous financial support by Aall he later studied in Mu...