Sien Josephine Teijssen
Casting Director
Sien Josephine Teijssen is a casting director based in Antwerp, Belgium. Originally trained in law, she discovered her passion for casting in 2011 and has been immersed in the profession ever since. In 2015, she founded SIEN JOSEPHINE CASTING, quickly establishing herself as a trusted voice in the industry. Known for her sharp eye and instinctive approach, she works closely with directors and producers to shape stories through casting—seeking out both trained actors and first-time performers who bring something special and authentic to the screen. Sien has extensive experience casting for Belgian as well as international projects, often assembling international ensembles for Belgian stories with global reach. Her recent credits include JULIE KEEPS QUIET (2024), Belgium’s official Oscar entry for 2025 and nominated for a Casting Society Artios Award for Outstanding Achievement in Casting for an International Feature, as well as the internationally acclaimed youth film YOUNG HEARTS (2024). In addition to her casting work, Sien is dedicated to elevating the profession and broadening access within the industry, and she serves as an active board member of CSA’s Global Chapter.
