Ford People's Manson Nyamweya has been elected as the new Member of Parliament for South Mugirango after garnering 14,099 votes in a by-election held on Thursday.
Mr Nyamweya beat former assistant minister Omingo Magara of People's Democratic Party (PDP) who managed 8,885. The poll was occasioned after Mr Magara lost an election petition. He had been declared the winner during the 2007 general election.
The Orange Democratic Party's Ibrahim Ochoi came third with 7,638 votes.
Mr Nyamweya's win will be seen as a triumph over Kenya's big political parties, the ODM and the Party of National Unity (PNU). ODM's big names led by the party leader Raila Odinga pitched camp in the constituency.
On the other hand, the PNU national leadership led by Vice President Kalonzo Musyoka came out strong to campaign for Mr Magara. The PNU campaign was joined by Cabinet Minister William Ruto of the ODM after he fell out with his party leader.