Ronnie James Dio was an American singer and songwriter, best known for his powerful voice and theatrical stage presence. Born on July 10, 1942, in Portsmouth, New Hampshire, he gained fame as the lead vocalist for several influential rock bands, including Rainbow, Black Sabbath, and his own band, Dio. Dio is often credited with popularizing the heavy metal genre and is known for his signature hand gesture, the "devil horns." Throughout his career, Dio released numerous albums and hit songs, such as "Holy Diver" and "Rainbow in the Dark." He was also recognized for his fantasy-themed lyrics and elaborate live performances. Dio passed away on May 16, 2010, but his legacy continues to inspire musicians and fans worldwide.