Gordon Brown, David Cameron and Nick Clegg are preparing to make political history by taking part in Britain's first ever prime ministerial TV debate.
The party leaders have been rehearsing for the 90-minute, live broadcast on Thursday night.
All three men will answer questions chosen by the audience and from viewers' emails.
Ahead of the debate, the politicians have been psyching themselves up.
Lib Dem leader Nick Clegg is planning to take "a long walk in the countryside", while David Cameron says he is "nervous, but looking forward to it."
Gordon Brown said "he was not nervous, but determined to get our views across."