Russell Allen (born July 19, 1971) is an American singer and lyricist best known as the vocalist of American progressive metal band Symphony X. He has also worked with supergroups Star One, Allen-Lande, Level 10, and as one of fourteen vocalists in the progressive symphonic metal band Trans-Siberian Orchestra. Since 2011, he has also served as the frontman of the heavy metal band Adrenaline Mob.