Axel Stig Hansson (11 June 1900 – 29 October 1968), known professionally as Jules Sylvain, was a Swedish composer, screenwriter and musician.Sylvain was born in Stockholm to actor Axel Hansson and actress and pedagog Valborg Hansson. At the age of 11, Sylvain began studying music at Lundsbergs boarding school but ran away from the school after four years. He studied piano lessons at Musikaliska Akademien between 1918 and 1920 and then continued to study at Music high school in Weimar between 1920 and 1922. He got his first income in 1918 as a café pianist in Stockholm. After that he worked as a musician in Germany for a few years. At his home coming in 1923 he made a name for himself at Kristallsalongen with the melodi Det är den dagliga dosisen som gör'et. During 1925 until 1928, Sylvain was employed as a chapel master for Karl Gerhard and composed a number of the singers songs.