As the daughter of popular Danish People's Theatre actress Julie Møller, Petrine Sonne debuted in 1892 as Madam Stabel in Henrik Hertz' Audiensen, when she jumped in as a duplicate during her mother's illness. From 1900, she was employed at various Copenhagen theatres until in 1927, she returned to Folketeatret, where she acted until her death. Her last role here was as the cook in K. Simonov's Heaven is Blue and the Grass Green, performed in the 1945-46 season. Her specialty was comic minor characters and character roles. Sonne was loved by the audience for her whimsical playing, and thus, like her mother, she became an important member of the People's Theatre. At the Folketeatret, it was told that Sonne always preferred small roles, because they were easy to learn and as an added benefit of such minor roles, she was able to go home again with the tram from Nørrevold to her home in Pile Allé before the transfer ticket expired. Sonne appeared in popular Danish silent films and in 1925, she starred in the great Danish director Carl Theodor Dreyer's film, You Must Honor Your Wife. She wove hermelin as a pastime. Sonne appeared in about forty Danish films in the first half of the twentieth century and received the Danish Royal Medal of Honour in gold in 1942.