Odinga died on Wednesday, while receiving medical treatment at a hospital in India.
According to the BBC, in recent weeks, there has been speculation about his health, although family members and political allies had dismissed reports suggesting he was critically ill.
A political mobiliser and towering figure in Kenyan politics, Odinga served as Kenyan Prime Minister between 2008 and 2013 and also ran unsuccessfully for the presidency five times.
He will be remembered for his contribution towards multiparty democracy in 1991 and a new constitution in 2010.
