Victoria Derbyshire is to host the Labour Leadership debate on BBC Radio 5 Live.
All five candidates will be put through their paces in front of a live audience as part of the only live radio debate in the contest.
David Miliband, Ed Miliband, Ed Balls, Andy Burnham and Diane Abbott will lay out their visions for the future of the Labour party and take questions from the audience of 5 Live listeners. The event takes place at the Oval Community Centre in Stevenage on July 29th and will also be shown on the BBC News Channel.
Victoria's listeners can email victoria@bbc.co.uk for a chance to be part of the audience.