Senior Liberal Tony Abbott has publicly called for Peter Costello to put his hand up for the opposition leadership, rather than wait for it to be handed to him in a bloodless coup.
The former treasurer arrived back in Australia from a family holiday on Saturday, reportedly convinced his party has finally decided he's the only person with a chance of defeating Prime Minister Kevin Rudd in 2010.
Mr Costello is understood to want to be approached to take over, with Opposition Leader Brendan Nelson to step down in his favour to avoid a damaging party room vote.
The government has already begun attacking Mr Costello's record on industrial relations.
Mr Abbott is suggesting it's time for Mr Costello to make a move, saying opposition MPs have made their opinions known publicly.