Wim Haazen was born in Antwerp. He developed an early interest in drawing, but his parents wouldn't allow him to go to the Art Academy. He went to work at a book club. He then had stints at Belvision and the Dupuis studios, but eventually became a sales representative. In his spare time, he assisted Jef Nys on the artwork and writing of Jommeke. Later on, he teamed up with Kris de Saeger to create the stop-comic 'Zeezus'. This strip earned them the first prize at a comics contest, which paved the way to a publication in Kuifje. Haazen stopped 'Zeezus' after about 80 strips, and took on the gag series 'Piccolo Bello' in cooperation with Marck Meul in Robbedoes in 1983.