ODM leader Raila Odinga has been named as the National Super Alliance flag bearer.
Raila will face off President Uhuru Kenyatta of Jubilee with Kalonzo Musyoka as his running mate.
NASA brings together Raila, Musalia Mudavadi (Amani), Kalonzo Musyoka (Wiper), Moses Wetang'ula (Ford Kenya), and Isaac Rutto (CCM).
Under the arrangement, ANC leader Musalia Mudavadi is proposed to take up the position of Premier Cabinet Secretary as earlier reported by The Star.
This will be created after the election in the event of NASA victory.
Under the Premier CS will be two powerful deputies of equal rank.
Rutto will be in charge of the State Department of Devolution and Planning.
The other deputy in charge of Public Service will go to Wetang’ula of Ford Kenya party.
The announcement of the August 8 polls team was made at Uhuru Park on Thursday by Mudavadi.
The principals have been under pressure to name the person who will battle it out with Uhuru.
Raila, 72, contested the presidency in 1997, 2007 and in 2013 but lost.
He was Kenya's prime minister from 2008-2012 under a power sharing deal, with former President Mwai Kibaki.
This was reached to end violence that rocked the country in 2007/08 after Kibaki's disputed win.
More than 1,300 people were killed in the skirmishes that also displaced some 650,000 Kenyans.
Expert comment: NASA has settled on a truly Face of Kenya ticket