Wilson proposed to Osbourne backstage during Black Sabbath’s Back to the Beginning finale on Saturday in Birmingham, England

The metal luminary, 76, took the stage with his original bandmates at a farewell festival in his Birmingham, England, hometown on Saturday night.

Reuniting onstage for the first time in two decades, Black Sabbath performed to a sold-out crowd of 40,000 with its all-star, one-day-only charity festival Back to the Beginning, held in Ozzy Osbourne’s hometown of Birmingham on July 5 and serving as a farewell concert to and celebration of the longtime rocker.