Sean Letourneau is an American voice actor based in Dallas, Texas, known for his work in English dubs of anime series. He was born in McKinney, Texas on June 21, 1999. His interest in acting began during his years of homeschooling when his mother challenged him to participate in a local theater production. He continued acting throughout middle school and high school theater before deciding to pursue it as a career. In 2018, he began seeking formal training, and by 2019 he connected with Bruce Carey at Voices Carey to help produce a professional demo.

Letourneau's career includes voice work for various game studios, web-series pilots, and commercial clients such as Microsoft, Tinder, and Spotify. In addition to performing, he also instructs voice-over coaching lessons at Voices Carey.

He has secured a number of prominent roles in anime English dubs. He is the voice of the main character, Gobrou (the goblin name of the protagonist Rou), in the fantasy series Re:Monster. His other notable anime roles include Set in Sacrificial Princess & the King of Beasts, Kazuhiro Maezono in MF Ghost, and Cyrus Rivermoore in Reign of the Seven Spellblades. He also voices Tsunagoro in the long-running series One Piece. His filmography includes a wide range of other series such as The Great Cleric, I'm in Love with the Villainess, My Hero Academia, Rent-A-Girlfriend, and Tsukimichi -Moonlit Fantasy-. Additional credits include roles in Blue Lock, Vinland Saga, The Fruit of Evolution, and Fairy Tail: 100 Years Quest.

Letourneau is also recognized for his role in the My Hero Academia franchise, voicing the character Wedge in the seventh season. He provided additional voices for the second season of Tsukimichi -Moonlit Fantasy-.

In early 2024, Letourneau publicly shared that he had been diagnosed with testicular cancer and underwent surgery, starting a fundraiser to help with medical expenses. The anime news community took note of his situation, highlighting his growing presence in the industry as a young, working voice actor.