Russell Brand has released a trailer of his interview with Ed Miliband posted on his YouTube show the Trews.
In a bid to gain a younger audience and widen his reach, the Labour leader said he agreed to be interviewed by Brand because the campaign is "too boring" and millions of people are disengaged with politics.
However, Miliband said he "profoundly" disagrees with Brand but sought to convince him of Labour's policies.
In an extract of the video, Miliband says he would stand up to global business, when quizzed by Brand about how far nations can "leverage serious influence" over multinational companies.
Labour sources deny that Miliband was seeking Brand's endorsement.
The full interview is over 30 minutes in length and discusses politics, community action and the value of voting. The comedian and activist is not registered to vote and the date for registration has passed.
But a Guardian report states that Brand believes the threat posed by the election of a Conservative majority government is so strong, that David Cameron should be defeated and voters should exercise their democratic right.
In the clip, Russell Brand presses Miliband over how far nations can "leverage serious influence" over transnational companies in a globalised world. Miliband concedes that it is difficult but insists that measures can be taken unilaterally.
There has been much speculation over the content of the interview after Miliband was spotted leaving Brand's East London home late on Monday night.
Labour sources stressed that the full interview, which is longer than 30 minutes, was designed to discuss politics, community action and the value of voting.
During the course of the film, Miliband is expected to be seen trying to persuade Brand that change can be achieved through the ballot box and that achievements such as the NHS, the minimum wage and the welfare state are all important voting matters.