Deputy NSW opposition leader Penny Sharpe has been criticised for tweeting a sign depicting NSW premier Gladys Berejiklian as the “wicked witch of the fest”.

The photo was taken at last night's Don't Kill Live Music Rally in Sydney's Hyde Park, where protestors were rallying against the State Government's new music festival regulations.

The posters from last night's rally were critical of the Government's new music festival regulations, which musicians and festival organisers have said are too strict