Harry Potter star Dame Maggie Smith, 73, back at work after cancer battle.

The Brit screen legend allegedly braved treatment while filming latest installment of the witchy film series Harry Potter and the Half Blood Prince - the sixth wizard flick.

Schoolmistress Minerva McGonagall was as stern as ever even while getting treatment, reporting daily for shooting while undergoing chemo.

Dame Maggie is now up and raring to go in new flick From Time to Time which had been postponed from March.

Ain't nothing like a Dame!