US funnyman Jack Black insists the forthcoming movie based on his band Tenacious D, will be the best music film ever.

The School Of Rock actor, who formed the band in 1994 with actor friend Kyle Gass, wants to cast a host of rock veterans to play lead roles in TENACIOUS D IN : THE PICK OF DESTINY.

He tells movie magazine Hotdog, "Man it's going to be awesome. It's going to be the Lord Of The Rings of rock.

"I swear to God, it'll be the best movie ever made.

"I want Meatloaf to play my dad. I want RAY ZOMBIE to play the wizard. And I want RONNIE JAMES DIO to play himself.

"With those guys on board, how could it fail?"