Eight parties on Tuesday officially joined Deputy President William Ruto-led Kenya kwanza Alliance coalition.
They include Chama Cha Kazi (CCK), Communist Party of Kenya (CPK), Devolution Party of Kenya(DPK) and Farmers Party.
Others are the Economic Freedom Party (EFP), The Service Party (TSP), Umoja Maendeleo Party and Tujibebe Wakenya Party.
Ruto, ANC party leader Musalia Mudavadi and his Ford Kenya counterpart Moses Wentangula witnessed the occasion.
Each of the parties will retain its distinct identities while supporting the Kenya Kwanza Alliance flag bearer in the presidential contest.
Twelve political parties have come under the fold of Kenya Kwanza, including the coalition's founding parties, the United Democratic Alliance (UDA), Ford Kenya and Amani National Congress, ANC.
The coalition has settled on Ruto as its presidential candidate in the August 9 polls.
Another party that joined the formation earlier is the Democratic party.