Milly Steger, born in Rheinberg as Emilie Sibilla Elisabeth Johanna Steger, spent her childhood in Elberfeld where her father was appointed as magistrate. After completing her general education, she received language and propriety education in a boarding school in London. While there, she took instruction in painting and decided to become an artist. In Elberfeld, she then attended a class for plasterers and stonemasons at the localarts and crafts school. From 1903 to 1906, she received private training from Karl Janssen in Düsseldorf, as women were not allowed to attend the arts academy. She moved to Berlin in 1908, where she began teaching at the Women's Academy at the Society of Berlin Artists. Steger was invited by the art patronKarl Ernst Osthaus to Hagen in 1910, where she was commissioned to create the first large-scale architectural sculpture for the city, creating four statues of women for the facade of the Hagen Theater. She was involved in the artist circle around Osthaus and made contacts with the sculptors Moissey Kogan and Will Lammert, the painter Christian Rohlfs, and the glass painterJan Thorn-Prikker. Steger lived in a house in the artists' colony "Am Stirnband" in Hohenhagen. For the tenth anniversary of the Folkwang Museum in Hagen in 1912, Milly Steger donated a sandstone women's head above the museum portal. In the following three years she designed reliefs for the Stadthalle Hagen. Supported by Osthaus, she participated in exhibitions of the Sonderbund and at the German Werkbund Exhibition in Cologne in 1914. Her financial situation deteriorated during World War I such that she could no longer afford the rent for her studio in Hagen. In 1917 she returned to Berlin, where she remained until the end of her life. Steger spent much of the rest of her life teaching drawing and sculpture. Notable avant-garde patron Katherine Dreier collected her work, but much of Steger's unsold work was lost when her studio was destroyed during World War II. Just before her death in 1948, Steger was named the honorary president of the Democratic Women's League of Germany.