Guido Cavalleri is an Italian voice actor, television presenter, and author, born Guido Luigi Cavalleri in Bergamo on November 7, 1963. He is best known for providing the Italian voice for the character Ryo Saeba in the anime series City Hunter.

Cavalleri's career in voice acting began alongside his work in children's television. He made his television debut in 1985 on the Rai 3 program L'Orecchiocchio. Throughout the 1990s, he became a familiar face to young Italian audiences as the host of several programs, most notably Ciao Ciao, which aired on Rete 4 and Italia 1 from 1991 to 1996. In these shows, he would introduce cartoons, often performing comic sketches. He also served as the head of the children's programming block for Telemontecarlo and presented the program Zap Zap in the late 1990s.

His most iconic and enduring voice acting role is that of Ryo Saeba, the protagonist of the City Hunter anime franchise. Cavalleri voiced the character in the first two anime series, City Hunter and City Hunter 2, as well as in numerous anime films and specials produced over the years. This long-standing association with the character was reaffirmed when he returned to the role for the 2019 film City Hunter: Shinjuku Private Eyes, which was released in Italian cinemas. His filmography for the franchise also includes City Hunter:.357 Magnum, City Hunter: Bay City Wars, City Hunter: Million Dollar Conspiracy, City Hunter: Secret Service, and City Hunter: Death of the Vicious Criminal Ryo Saeba.

Beyond City Hunter, Cavalleri has lent his voice to a wide range of other prominent anime characters. He voiced Takehiko Henmi in the series Dear Brother, a role specifically noted by the user. He is also recognized for his work as Hisashi Mitsui in Slam Dunk and as Sakyo in Yu Yu Hakusho: Ghost Files. In the globally popular soccer anime Holly e Benji, known in Italy as Holly e Benji - Due fuoriclasse, he voiced both Pierre Le Blanc and Clifford Yuma. His other anime credits include Tsukutsun Tsun in a later dub of Dr. Slump and Monroe in the Filmation series Ghostbusters. He also voiced the character Sansho in the second Italian edition of the Dragon Ball Z film Dead Zone.

In addition to his work in animation, Cavalleri has dubbed roles in live-action television series. Notably, he was part of the Italian voice cast for the popular soap operas Santa Barbara, Quando si ama, and Gli anni felici. He also provided the Italian voice for Michael Jackson in the film Moonwalker.

Since 2001, Cavalleri has also worked extensively as a television author, contributing to programs such as La macchina del tempo on Rete 4 and Missione Natura on LA7.