Niko Macoulis is a German actor and voice actor born in 1960. He began his career in the late 1960s as a child actor, appearing in German television series such as Salto Mortale and Ein Jahr ohne Sonntag. Over the course of his career, he has been predominantly active as a voice actor, contributing to more than 900 productions.

In the realm of animation, Macoulis is known for providing the German voice for a wide array of characters. One of his notable roles is Athos in the anime series Anime Sanjushi, also known as D'Artagnan und die drei Musketiere. His extensive voice work includes characters in numerous other animated series. He is the German voice of Gary Eich in the Pokémon anime and has voiced characters in Beyblade, including Tala Valkov and Rick Anderson. He has also lent his voice to characters in Transformers, such as Chip Chase in Transformers: Generation 2 and Jetfire in Transformers: Armada. His work extends to popular Western animation as well, where he has voiced multiple characters in The Simpsons, including Otto, Dolph, and Uter Zörker, and Neil Goldman in Family Guy.

Beyond these roles, Macoulis's extensive filmography includes voice work in a variety of other projects. He voiced Draegan in Conan und seine tapferen Freunde, Dr. George Huang in Law & Order: Special Victims Unit, and Furcht in The Nightmare Before Christmas. He has also contributed to the German dubs of live-action films, such as La Boum – Die Fete, and video games like Final Fantasy VII: Advent Children, where he voiced Yazoo. His work demonstrates a long-standing and prolific career in the German dubbing industry, collaborating with various dubbing studios across numerous high-profile productions.