Alex Bergen is a Canadian voice actor based in Calgary, Alberta, known for his extensive work in English dubs of anime series. A multi-disciplinary performer, Bergen began his career as a child actor and has experience across stage, television, and voice-over, having lent his voice to over twenty-five unique characters.

Bergen is particularly recognized for his roles in several long-running anime franchises adapted for an English-speaking audience. He is the English voice of Tetsuya Kurodake in the series Future Card Buddyfight and its sequels, including Future Card Buddyfight 100, a role he performed in numerous episodes. In the Cardfight!! Vanguard universe, Bergen has voiced multiple characters across various installments. He is credited as the voice of Taishi Miwa in Cardfight!! Vanguard, Cardfight!! Vanguard: High School Arc Cont., and Cardfight!! Vanguard: Shinemon Arc. He also voices Karl Yamaji in several Cardfight!! Vanguard G series and, more recently, Raika Koshiba in Cardfight!! Vanguard will+Dress.

Beyond these prominent roles, his filmography demonstrates recurring work with specific production studios and a versatility in character types. He has voiced characters in other notable dubbed anime such as Kiznaiver, World Trigger, and Beyblade Burst. His work also extends to video games, including the Nintendo 3DS title LBX. In some earlier credits, such as for Cardfight!! Vanguard G, he is listed under the name Alex Day.

In addition to his voice acting, Bergen is a trained singer and musician, skills that complement his performance range, which spans from young boys to adult men. He is also active in on-camera and commercial work in his home region.