Lucas Papademos has said the priority of his incoming coalition cabinet is to seek unity to keep Greece in the eurozone.
"The choices we make will be decisive for the Greek people," he said, adding that the euro was vital for prosperity.
Debt-laden Greece must quickly approve a EU bailout to secure vital loans.
Mr Papademos, a former European Central Bank vice-president, was named on November 10 after protracted talks. His cabinet is to be sworn in on November 11.
Mr Papademos, who is not a member of parliament, will head the interim government until elections can take place in February.
He will clearly have strong European support given his past experience Đ but there will be some Greeks who see EuropẽOs hand a little too clearly behind his appointment.
Reports say he has accepted that the current Finance Minister, Evangelos Venizelos, remains in place. The exact make-up of the new coalition government is yet to be agreed.