The microphone used by Cornelis in the studio-scenes when recording the album "Poem, ballader och lite blues" is the actual microphone that was used in the real-life recording of the album.
The scenes shot in the music studio "Metronome" is the actual studio where Cornelis was discovered by Anders Burman in the 60's.
Cornelis' friend Hasse and hairdresser Sigge at Länkarna in the movie are played by themselves and were actual friends of the singer while he lived at Länkarna in Solna. The room were Cornelis is sleeping in was his actual room. N.B the room has no windows which was a special request of Cornelis.