As announced earlier in the month, Sky, the BBC and ITV have agreed a format with Gordon Brown, David Cameron and Nick Clegg for three peak-time televised debates ahead of the general election.
Hosted by Sky News political editor Adam Boulton, Sky's programme will be broadcast from England's South West and feature the theme of foreign policy.
Under the agreed format, each broadcaster will be able to take their own approach to gathering questions for the debates.
Sky News has therefore issued a request for viewers to submit questions via a dedicated section on its official website.
Despite the theme of foreign affairs, viewers can submit questions on any election issues, with all submissions being edited by Boulton.
Any viewer whose question is selected will be invited to join the studio audience at the debate and put their question directly to the leaders.
Sky News executive editor Chris Birkett said: "Sky News has campaigned hard for these debates and this is a fantastic chance for members of the public to put the three main party leaders on the spot, and get them to address the issues that matter in this election."
Viewers are also being asked to send in questions for Sky's additional TV debates featuring the main political parties in Scotland and Wales.