Internet users will be able to ask the three main political party leaders questions on Facebook and YouTube.
The leaders have agreed to take part in an online debate in which users will be able to suggest questions in five categories which will then be voted on by other members of the public.
Gordon Brown, Nick Clegg and David Cameron have promise to post videos or responses to these questions 10 days before the election.
The categories include, economy, education, law and order, foreign policy and miscellaneous.
Another historic first, sees the leaders also taking part in televised debates in the run up to election day.
Director of communications for Google, Peter Barron, said: "Although the televised debates will be a historic first, we feel that that there is an opportunity for a different type of platform that allows voters to be in charge of the questions.
"By collaborating with Facebook to put together one initiative we hope to enable as many voters as possible from across the UK to take part."
Richard Allan, Facebook's Director of Policy, stated: "The dawn of the digital election this year is a transformative moment for democracy in Britain. By allowing voters to cross-examine their leaders, these digital debates will put the voters firmly in charge.
"This marks a decisive shift away from the constraints of top-down traditional media and will take full advantage of unique scale and reach of Facebook, thus changing the way that politicians campaign for good."