Taoiseach Enda Kenny and former Taoiseach Bertie Ahern are to be called to give evidence at the Oireachtas banking inquiry.
The two men are on the inquiry's final list of witnesses, to be heard in July.
Bertie Ahern will be questioned on economic policy during his tenure, while Enda Kenny will be consulted about his financial policies as an opposition leader.
Richard Bruton and Joan Burton will also be called to appear before the inquiry, as will former finance spokespersons for Fine Gael and Labour, as well as ex-Labour leader Pat Rabbitte, former Tánaiste Mary Harney, and former Green Party minister Eamon Ryan.
Former International Monetary Fund executive Ajai Chopra has also confirmed his appearance.
Up to 10 bankers from the former Anglo Irish Bank are also to be called, including Seán FitzPatrick and David Drumm.
Meanwhile the role of external auditors to the banks will be under scrutiny today.
Senior partner with Pricewaterhouse Coopers Ronan Murphy and John McDonnell, also a partner with PWC, will be before the inquiry this morning.
Former managing partner at Ernst and Young Paul Smith, and audit partner at Ernst and Young Dargan Fitzgerald will give evidence.
They will be asked, among other things, about the integrity of financial reporting, and the appropriateness of property-related lending strategies.