Bill Capizzi was an American voice actor known for his work in numerous animated series and films, particularly in the dubbing of Japanese anime for English-speaking audiences. He was born on March 21, 1937. Information regarding his early life indicates he was from Somerville, Massachusetts, and was also raised in North Hollywood, California. Over his career, he was also credited under the names Bill Capeze, Bill Kapezi, and A. Gregory. Capizzi passed away on March 26, 2007, in Scottsdale, Arizona, at the age of 70.

Capizzi's career was marked by a wide array of voice roles in anime during the 1980s and 1990s, a period when many Japanese series were being adapted for the U.S. market. His filmography demonstrates his versatility in portraying a range of characters, from villains to comedic figures. He provided the voice for the character IQ-9 in the English dub of the 1978 film Farewell to Space Battleship Yamato. He also voiced the menacing Wolf, also known as the Wolf King, in the dark fantasy film Ringing Bell. In a different vein, he voiced the title character in an English version of Puss in Boots for the series My Favorite Fairy Tales. His role as Takashi in the 1987 film Twilight of the Cockroaches further exemplifies his involvement in distinctive anime features.

Beyond these specific credits, Capizzi was a prolific presence in many other major anime productions. He had multiple roles in the influential series Robotech, voicing characters such as the Robotech Masters, Konda, Colonel Maistroff, and General Reinhardt. He was also part of the voice cast for G-Force: Guardians of Space, where he voiced a Galactor. In the popular series Digimon Adventure, he lent his voice to the character Frigimon. His other anime credits include roles in Grimm's Fairy Tale Classics, Windaria, Mon Colle Knights, and Teknoman.

In addition to his anime voice work, Bill Capizzi built a substantial career as a character actor in live-action television and film, often appearing in small or bit parts. His television appearances included guest roles on popular shows such as Night Court, Murder, She Wrote, NYPD Blue, Hunter, and Major Dad. On the big screen, his credits included the live-action films Summer School, Don Juan DeMarco, and Made, as well as voice work in the live-action/CGI hybrid Babe: Pig in the City, where he voiced Snoop the Sniffer Dog. This combination of voice acting for animation and on-screen character roles defined his lengthy career in the entertainment industry.