They offered no cost estimate, don't have funding, and would need voluminous regulatory approvals to make changes to the bridge, which has numerous historicallandmark designations.
He went on to direct such landmark dramas as The Conformist, the controversial Last Tango and historical epic The Last Emperor, winner of nine Academy Awards in 1988.
Mr Anderson said the plan was "a fantastic opportunity to breathe new life into the building", adding that it was "an important landmark in the heart of our city, with outstanding architectural and historical value".