Robert John Arthur Halford is an English singer-songwriter, and is the lead vocalist for the Grammy Award-winning English heavy metal band Judas Priest.

He is considered one of the most consistently powerful singers in rock, possessing a wide vocal range, and is particularly known for his trademark high-pitched, operatic, soaring screams. His vocal range currently spans nearly four octaves. In addition to his work with Judas Priest, he has been involved with several side projects, including Fight, 2wo and Halford.

AllMusic said of Halford, "There have been few vocalists in the history of heavy metal whose singing style has been as influential and instantly recognizable... able to effortlessly alternate between a throaty growl and an ear-splitting falsetto."

He has also been nicknamed "Metal God" by fans. He was inducted into the Rock and Roll Hall of Fame as a member of Judas Priest in 2022, via the Award for Musical Excellence.