Jack Black and young band cover Mr. Crowley for Mary Morello's 100th birthday

It seems Jack Black will never shake his role of Dewey Finn in School Of Rock – the actor and musician has just been captured jamming with a band of young teens at a birthday party for Tom Morello’s mother.

Watch Jack Black sing Ozzy Osbourne classic at Tom Morello's mum's

Jack Black sings Ozzy Osbourne's 'Mr. Crowley' at Tom Morello's

Jack Black sings Ozzy Osbourne's 'Mr. Crowley' at Tom Morello's

Jack Black + Kids Cover Ozzy at Morello's Mom's 100th Birthday

Jack Black & A Band Of Pre-Teens Cover Ozzy Osbourne At Tom

Jack Black + Kids Cover Ozzy at Morello's Mom's 100th Birthday

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Jack Black Leads a Real-Life 'School of Rock' to Celebrate Tom

Jack Black and a bunch of kids performing Ozzy Osbourne's Mr

Jack Black and a Kid Band Rock Mary Morello's Birthday - American

Jack Black and a bunch of kids performing Ozzy Osbourne's Mr

Jack Black and the School of Rock Break Out an Ozzy Osbourne

Jack Black + Kids Cover Ozzy at Morello's Mom's 100th Birthday

Jack Black and young band cover Mr. Crowley for Mary Morello's