Camilla is to officially open The Pound arts centre in Corsham on October 26.
Prince Charles' wife will declare the centre, which has undergone a £1.2 million refit, open after a tour of the building.
She will also see a short perfomance in the new look audotorium.
Pounds Arts Trust has been working with North Wiltshire District Council, which owns the building, over the past four years to create a lively hub for entertainment in the town.
Money has come from the council and the Arts Council England South West.
The centre now has a 110 seat audotorium, a 45 seat studio theatre, rehearsal rooms, a gallery and a cafe/bar area.
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