Marin Miller is an American voice actor known for their extensive work in anime dubbing, animation, and video games, with a career spanning over two decades. They were born on August 19, 1987, in San Bernardino County, California, and began their journey into voice acting at the age of 19 after relocating to Dallas, Texas, to record background voices for the Fullmetal Alchemist movie Conqueror of Shamballa at the invitation of voice actor Mike McFarland. This initial opportunity led them to study and take classes in Los Angeles, laying the foundation for their career. Prior to focusing on voice work, Miller gained diverse performance experience, including playing characters such as Shrek and Homer Simpson at a Universal Studios theme park and training in opera, which they pursued after being told they had a voice suited for classical performance.

In anime, Miller has accumulated a wide range of credits. Early prominent roles included Yuuno Scrya in Magical Girl Lyrical Nanoha and Kyosuke Kamijo in Puella Magi Madoka Magica. They have voiced characters across numerous popular series, such as Amanda O'Neill in Little Witch Academia, Recon in Sword Art Online, Satoshi in Anohana: The Flower We Saw That Day, a young Kiritsugu Emiya in Fate/Zero, Gloxinia in The Seven Deadly Sins, and Enkidu in Fate/Grand Order - Absolute Demonic Front: Babylonia. Miller's work within the Fate franchise also includes the role of Lancer in Fate/strange Fake -Whispers of Dawn- and its subsequent television series, where they provide the English voice for the character opposite Yū Kobayashi's Japanese performance. More recent anime roles include Namari in Delicious in Dungeon, Nasiens in The Seven Deadly Sins: Four Knights of the Apocalypse, Abyss in Mashle: Magic and Muscles, and Minato in the Ranma 1/2 remake. Their filmography also features significant roles in video games, most notably as the non-binary Cloud Strider Nimbus in Destiny 2: Lightfall, Athena, Alecto, and Tisiphone in Supergiant Games' Hades and its sequel, and the Caretaker in Dragon Age: The Veilguard.

Beyond performance, Miller contributes to the industry as a writer and script adapter. They have worked on English adaptations for projects including the Ranma 1/2 remake, Cannon Busters, Persona 5: The Animation, and the live-action series Shogun. A notable achievement includes authoring a trans-centric speech therapy curriculum developed alongside speech-language pathologists, drawing from their personal experience as a non-binary actor who vocally transitioned while continuing their career. Miller, who uses they/them pronouns and publicly came out as non-binary, changed their professional name from Marianne to Marin in 2021.