The original line-up of heavy metal legends Black Sabbath, including Ozzy Osbourne, will play together for the first time in 20 years at a one-off concert on July 5 in Birmingham, England, organisers said on Wednesday.

Black Sabbath and Ozzy Osbourne's swan song boasts a stacked metal lineup unlike any other single-day festival of this century.

Ozzy Osbourne will come out of touring retirement and reunite with the full Black Sabbath lineup for the first time in 20 years.