Van Acken grew up in Schleswig-Holstein, where she still lives today in a small village. As a child, she was interested in horseback riding and dancing. She first took the stage in 2011 as an extra in a production of *Der Ölprinz* at the Karl May Festival in Bad Segeberg. She did not undergo formal training as an actress; instead, she studied other actors by watching them in films.

In 2014, Van Acken played the lead role—that of the deeply religious teenager Maria—in the drama *Kreuzweg* (Stations of the Cross), directed by Dietrich Brüggemann. The film won a Silver Bear at the 2014 Berlin International Film Festival. In Brüggemann’s next film, *Heil*—a satire about neo-Nazis—Van Acken portrayed a teenager. She also played a small role in Bernadette Knoller’s RBB television film *Ferien*.