Justin Pierce is an American actor and voice actor known for his work in animation and television. He is also credited professionally under his full name, Justin Luther Pierce. His path to acting was unconventional, beginning with training as a professional wrestler under the guidance of the Dudley Boyz. After relocating to Los Angeles to take acting classes, he decided to pursue a career in acting instead. He later moved to New York City to study theatre, where he performed in plays and wrote adaptations of Shakespearean works, before returning to Los Angeles to focus on opportunities in film, television, and voice acting.

As a voice actor, Pierce has a deep-toned and versatile vocal style, often described as warm, sincere, and authoritative. His most prominent voice role to date is Optimus Primal in the English dub of the anime series Transformers: War for Cybertron Trilogy - Kingdom, a Netflix original production that premiered in 2021. His other on-screen acting credits include appearances on the daytime dramas Days of Our Lives and The Young and the Restless. Pierce operates as a professional voice actor with his own home studio, allowing for a quick turnaround on projects ranging from animation and video games to commercials and narrations.