He was born in Bergen as a son of ship-owner Bernt Ulrich August Müller and Amalie, née Alver.
His mother later remarried as Amalie Skram and became one of Norway's best-known authors.
After Jacob Worm-Müller finished his secondary education in 1884, he studied law, but mixed socially with the Kristiania Bohemians and was subsequently sent by his mother to Copenhagen.
[2][3][4] Jacob Worm-Müller issued the novels Fire dage ("Four Days", 1894) and Stormen ("The Tempest", 1895), both on the publishing house Gyldendal.
Despite working several years in Dagbladet, this newspaper's obituary noted that Worm-Müller had become "reactionary", in "both social as well as religious" aspects.