Ozzy Osbourne has announced a farewell world tour for 2018 that will run through 2020.

The rock star will begin touring on May 5 in Mexico at a venue that has yet to be announced.

The first leg of the tour will cover South America and Europe with the final show taking place July 2 at the Meo Arena in Lisbon, Portugal.

Live Nation has said North American dates will be announced next year.

"People keep asking me when I'm retiring," Osbourne said in a statement. "This will be my final world tour, but I can't say I won't do some shows here and there."

Recently, Osbourne took part in his band Black Sabbath's final world tour with a documentary showcasing their final concert titled The End of the End premiering on Showtime in September.

Osbourne's longtime collaborators Zakk Wylde (guitar), Blasko (bass), Tommy Clufetos (drums) and Adam Wakeman (keyboards) will be joining him on the tour.