Kevin D. Thelwell is an American voice actor known for his extensive work in English-language dubs of anime series and films, typically associated with studios such as Funimation, Crunchyroll, and Bang Zoom! Entertainment. Born on August 24, he has built a career voicing a wide range of supporting and principal characters across various genres.

Thelwell is a Caribbean American voice actor based in Dallas, Texas, whose professional activities also span audiobooks, commercials, and video games. His voice credits include numerous notable roles in popular series. He voices Zeus in the long-running series One Piece and its film One Piece Film Red, as well as Julian Loki in BLUE LOCK 2nd Season. His other prominent roles include Naoya Mukai in Girlfriend, Girlfriend, Shinsuke Kita in Haikyu!! To The Top, and Junnosuke Nakano in Aoashi. In the live-action adaptation of True Beauty, he provides the voice for the character Jimin. He is also the voice of Haruto Zenfis in Am I Actually the Strongest?, Rein in Beast Tamer, Daisuke Sato in Tojima Wants to Be a Kamen Rider, and Kazuhiko Nukumizu in Makeine: Too Many Losing Heroines!. His fantasy and adventure roles include Poseidon in Sleepy Princess in the Demon Castle, while in science fiction he voices both Chise Osen and Rui Kino in 86. He has also voiced characters in the video games Genshin Impact and Pokémon Masters.

Beyond voice acting, Thelwell has contributed to anime production as an assistant ADR director for numerous English dubs, including series such as Frieren: Beyond Journey's End, My Dress-Up Darling, and Mobile Suit Gundam: The Witch from Mercury. This behind-the-scenes work demonstrates his involvement in the localization and dubbing process beyond performing roles.