Greg Chun is an American voice actor and musician known for his extensive work in English-language dubs of anime and video games. Born on November 11, 1971, in Evanston, Illinois, and raised in Chicago, he is a graduate of Stanford University. He is of Korean descent and is based in Los Angeles, California, where he splits his time between voice acting and music production.

In the realm of anime, Chun has provided voices for a wide array of characters across numerous popular series. He is perhaps best known for his role as the primary antagonist Muzan Kibutsuji in the global phenomenon Demon Slayer: Kimetsu no Yaiba, a role he has reprised for the series' Entertainment District Arc and subsequent films. He also voices the powerful monster Garou in One Punch Man and the legendary Viking Thors Snorresson in Vinland Saga. His other significant anime credits include Villar Constance in Record of Grancrest War, Tatsumi Leonard Aragaki in both Megalobox and Megalobox 2: Nomad, Hideomi Iba in Sirius the Jaeger, and the spectral cat Matamune in Shaman King. He has also voiced characters in long-running franchises such as Ikalgo in Hunter x Hunter, Twice H. Pieceman in Fate/Extra Last Encore, and Gabriel Miller, also known as Subtilizer, in Sword Art Online: Alicization - War of Underworld. His film work includes voicing Ryoji Kaji in the Netflix dub of Neon Genesis Evangelion.

Beyond anime, Chun is highly active in video games, where he has achieved considerable recognition. He is the English voice of Takayuki Yagami in the acclaimed Judgment series and Yu Nanba in Yakuza: Like a Dragon. He has voiced Adam in Nier: Automata, Alfyn Greengrass in Octopath Traveler, and Kaname Date in AI: The Somnium Files. For Nintendo, he has voiced multiple characters in the Fire Emblem franchise, including Lukas, Eldigan, Ephraim, and Ike, the latter of which he also voices in the Super Smash Bros. series. His other prominent roles include Dr. Harold Winston in the Overwatch animated shorts, Hiro Morgan in Detective Pikachu, and Count in Ace Combat 7: Skies Unknown. He has also contributed voices to major franchises like World of Warcraft and Fallout 4. In addition to animation and games, Chun is the English dubbing voice for Seong Gi-hun, the lead character played by Lee Jung-jae in the hit Netflix series Squid Game.

In parallel with his voice acting career, Chun is an accomplished musician and composer. He has produced music for numerous national advertising campaigns and hundreds of mobile games. He is known for his long-standing collaboration with the comedy group The Lonely Island, creating music for their projects featured on Saturday Night Live, the 67th Primetime Emmy Awards, and the Netflix series I Think You Should Leave with Tim Robinson. As a music director and performer, he has also graced the stages of prestigious venues such as Carnegie Hall, the Dolby Theatre, and the Walt Disney Concert Hall.