Marco Sven Reinbold is a German actor, voice actor, and audiobook narrator, born on February 27, 1985, in Büdingen, Hessen. His professional work is centered in Berlin, where he is active as a voice artist, singer, musician, and producer. He is a member of the Verband Deutscher Sprecher, the professional association for German voice actors.

Reinbold has lent his voice to a wide array of characters in German-dubbed anime, becoming a recognizable presence in the industry. He is known for voicing Karma Akabane across several titles in the Assassination Classroom franchise, including the main series, the film Assassination Classroom the Movie: 365 Days' Time, and the spin-off Koro Sensei Quest!. He is also the German voice of Mashirao Ojiro, also known as Tailman, in the long-running series My Hero Academia and its film My Hero Academia the Movie: Heroes Rising. His other prominent anime roles include Jircniv Rune Farlord El Nix in Overlord II, III, and IV, Kyouhei Kashihara in Arpeggio of Blue Steel - Ars Nova and its film sequels, and Junpei Iori in the Persona 3 film series. He voiced Asuta Jimon in World Conquest Zvezda Plot, Shinji Matou in various Fate titles including Fate/stay night: Unlimited Blade Works and the Heaven's Feel film trilogy, Kyouji Shinkawa in Sword Art Online II, and Isami Aldini in Food Wars! Shokugeki no Soma. His range extends to characters in Hunter × Hunter, Akame Ga Kill!, and Tenkai Knights.

Beyond animation, Reinbold's voice work is extensive in live-action series and films. He provided the German voice for the lead role of Fatty Choi in the series Interior Chinatown and for Player 246 (Park Gyeong-seok) in the global phenomenon Squid Game. His voice is also featured in numerous video games; he is the German voice of the protagonist Prince Noctis in Final Fantasy XV and has roles in major franchises like Assassin's Creed Shadows, Call of Duty: WWII, World of Warcraft, and Tom Clancy's The Division. In the realm of audiobooks, he has garnered significant acclaim, particularly for his narration of Pierce Brown's Red Rising saga, with one review portal calling it an "überragende Interpretation" (outstanding interpretation). His audiography also includes works like Robert Ludlum's Bourne titles and titles from the Perry Rhodan series.

Reinbold is also active as a station voice for German broadcasters such as ZDFinfo, Deutschlandfunk Nova, and Sky. His vocal qualities are often described as having a youthful to middle-aged timbre, with a bright, clear, and occasionally rough tone. In addition to his voice work, he is also involved in music and performance art.