Jignesh Mevani said Congress played a key role in the Indian independence movement and he has decided to join the Sonia Gandhi-led party as he thinks it can end the "misrule" of the BJP.
Congress general secretary KC Venugopal and Gujarat Congress working president Hardik Patel are also likely to be present when Kumar and Mevani will join the Congress.
Sources in Congress said Rahul Gandhi wants to overhaul the Congress party by bringing more young and fresh faces to take on the BJP.
The development comes ahead of the next year's Assembly elections in the BJP-ruled Gujarat.
Congress leaders had confirmed that Kanhaiya was in talks with the party and that they were looking to induct him to strengthen the party in Bihar.
After Gujarat MLA Jignesh Mevani, JNU student leader Umar Khalid receives death threats from same gangster
Khalid approached the police with a complaint about the threats from the man who identified himself as fugitive gangster Ravi Pujari and a case was registered.
Dalit leader and Independent MLA from Gujarat Jignesh Mevani today alleged that he had received a death threat from a person who identified himself as fugitive gangster Ravi Pujari.
Dalit leader and Gujarat MLA Jignesh Mevani today alleged that a man threatened to shoot him.
A defamation case has been registered against Gujarat MLA and Dalit activist Jignesh Mevani after he allegedly tweeted a morphed picture of a city-based columnist, police said today.
Outrage after Dalit man thrashed to death in Gujarat; Jignesh Mevani fumes after video of incident goes viral
According to the complaint filed by the victim's wife, Jayaben Vaniya, her husband was beaten up by five people as they suspected the couple of committing a theft.
Gujarat MLA Jignesh Mevani today visited Dalit families in Alwar and enquired about the violence in the district during a Bharat bandh last month.
Karnataka polls: BJP files complaint against Gujarat MLA Jignesh Mevani for remarks on PM Narendra Modi
In the complaint letter the BJP accused Mevani of calling Prime Minister Modi 'a corporate salesman and a thief.'
The administration of Nagaur, where Mevani had a rally, had restricted his visit and the police stopped the Gujarat MLA at the airport to inform him about the order.
Setting a deadline of August 15, the Dalit leaders threatened massive protests across the country if the issue was not resolved.
Angry crowds shooed away BJP MLAs from visiting the deceased's family, while demonstrations were held in various parts of the state.