Susanna Bonasewicz is a German actress and voice artist, born in Berlin on October 3, 1955, who has built a prolific career spanning theater, film, and particularly voice acting for both animation and live-action productions. Her interest in performing began in childhood, leading to her first film appearance at the age of six. After completing her education at a private drama school in Berlin, she gained experience on various theater stages in the city. Since the mid-1970s, she has focused extensively on voice work, becoming one of Germany's most recognizable and enduring talents in the field of dubbing and audio dramas. She is also active as a dialogue director and dialogue writer, contributing to the German versions of productions such as the series Sherlock and the film Sex and the City.

Bonasewicz is the designated German voice for several prominent actresses, including Carrie Fisher, Isabelle Huppert, Isabella Rossellini, and Sissy Spacek. Her most iconic and long-running role is voicing the young witch Bibi Blocksberg in the immensely popular German audio drama series of the same name, a character she has portrayed since 1979. This role extended to the spin-off series Bibi and Tina and guest appearances in the related Benjamin Blümchen series. In the realm of animation, she is confirmed to have voiced the character Winnie in the German version of the anime series Ahiru no Quack. Her voice is also widely recognized as Princess Leia Organa in the Star Wars film saga, Fran Fine in the sitcom Die Nanny (The Nanny), and Jody Banks in the action series Ein Colt für alle Fälle (The Fall Guy). In audio dramas, her work includes roles in the long-running horror series Geisterjäger John Sinclair, among many others.

Throughout her decades-long career, Bonasewicz has established recurring collaborations not only with specific actresses like Fisher, Huppert, Rossellini, and Spacek but also with major German dubbing studios and directors. Her contributions to the industry were recognized in 2009 when she received the Die Silhouette award for her lifetime achievement as a dubbing actress. Her voice is noted for its warmth, versatility, and enduring youthful quality, allowing her to convincingly portray characters ranging from a spirited thirteen-year-old to iconic adult roles across live-action and animated features.