Josh Grelle, now known professionally as Jessie James Grelle, is an American voice actor and ADR script writer recognized for a prolific career providing English-language voices for characters in Japanese anime, video games, and animated series. Born Joshua Grelle on November 2, 1985, in Clifton, Texas, they began working in the voice acting industry around 2005, primarily with major dubbing studios such as Funimation (now Crunchyroll), ADV Films, and Sentai Filmworks.

Grelle's career is marked by a wide range of leading and supporting roles across numerous popular anime series. They are particularly well-known for voicing protagonists and key characters in various genres, including action, drama, and comedy. Some of their most prominent and enduring roles include Armin Arlert in the monumental series Attack on Titan, a performance they have continued through multiple seasons and films. They also voice Fumikage Tokoyami in the long-running superhero series My Hero Academia and its associated movies. In addition to these, Grelle has taken on leading roles such as the strategic Shido Itsuka in Date A Live, the determined Futaro Uesugi in The Quintessential Quintuplets, and the demon lord Sadao Maou in The Devil Is a Part-Timer!. Their filmography extends to series like Vinland Saga (as Canute), Dr. Stone (as Kinro), and Free! (as Aiichiro Nitori), demonstrating a consistent presence in the English dubbing industry. Grelle has also lent their voice to characters in video games, including Ludger Kresnik in Tales of Xillia 2 and Demigra in Dragon Ball Xenoverse.

Throughout their career, Grelle has frequently collaborated with other voice actors and worked on numerous projects for the same dubbing studios, becoming a familiar voice to fans of English-dubbed anime. In addition to performing, they have also contributed as an ADR script writer, further involving themselves in the adaptation process. In March 2023, Grelle publicly came out as a transgender woman and announced the use of she/her or they/them pronouns, now going by the name Jessie James Grelle.