Celebrity chef George Calombaris has put much of his restaurant empire into voluntary administration.

Advisory and investment firm KordaMentha has been appointed as administrators of 22 companies in the Made Establishment Group.

Calombaris’ Made Establishment group, which operates 12 restaurants and food venues in Melbourne, is going into voluntary administration after a meeting on Monday afternoon.

Meanwhile, Heston Blumenthal has been dumped from MasterChef Australia.