Cathrin Vaessen is a German actress and voice actor, born on December 23, 1962, in Hattingen, Germany. While she has appeared on screen, most notably in the German soap opera Gute Zeiten, schlechte Zeiten, her primary body of work is in voice acting, where she has provided the German voice for numerous actresses in films and television series.

Vaessen's career is defined by her extensive work as a dubbing artist, lending her voice to a wide range of characters across various genres. Her most significant recurring collaboration is with American actress Dina Meyer, for whom she has become the regular German voice. This collaboration directly connects her to the role of Isabelle 'Dizzy' Flores, a character Meyer has portrayed. Vaessen voiced Dizzy Flores in the original 1997 live-action film Starship Troopers and later reprised the role for the 2017 animated feature Starship Troopers: Traitor of Mars. Her work dubbing Dina Meyer extends to other major film franchises, including the Saw series, where she voiced Meyer's character, Detective Kerry, in the first four films.

Beyond her work with Dina Meyer, Vaessen's voice acting career includes a vast number of credits, with the Deutsche Synchronkartei listing her for nearly 200 roles. She has dubbed prominent actresses such as Téa Leoni in Bad Boys, Julianna Margulies in ER, Cameron Diaz in She's the One, Kelly Hu in X-Men 2, and Celia Imrie in Star Wars: Episode I - The Phantom Menace. This extensive filmography establishes her as a prolific and established figure in the German dubbing industry.