From the BJP, the MLCs nominated include Janak Ram, a former Gopalganj MP who was recently made the states minister for mines and geology.
When asked what his role will be like after the merger, Kushwaha said that he has left it on CM Nitish Kumar to decide and further hinted that he would work for boosting the education sector.
Leader of Opposition in the Assembly Tejashwi Yadav, along with party state chief Jagdanand Singh gave them the primary memberships of the party.
Prominent among others who joined the are principal general secretary Nirmal Kumar, Birendra Kushwaha, and Madhu Manjari.
Under the leadership of Upendra Kushwaha, the party had failed to secure even a single seat in the 243 member Bihar Assembly.
The RLSP chief dodged queries about his numerous meetings, in the recent past, with Chief Minister Nitish Kumar, his former mentor, whom he had revolted against a decade ago.
RLSP-JD(U) merger on the cards? A day after AIMIM MLAs meet Nitish Kumar, Upendra Kushwaha follows suit
Former state president of JD(U) Vashishtha Narayan Singh also attended the meeting between Nitish Kumar and Kushwaha.
He also said that though his party couldn't win a single seat in the assembly election, there is no doubt that the RLSP has expanded its political base in the state.
The complainant has taken exception to a tweet shared by the actor, which carried a photograph taken during the recent assembly elections in Bihar with the caption "new star in tukde tukde gang".
Kushwaha said he had a cordial meeting with Kumar earlier in the week but denied hammering out a deal for the homecoming. He, however, did not rule out the possibility of a reunion in future.
RLSP spokesperson Bhola Sharma did not rule out the possibility of the party joining the NDA yet again.
Upendra slammed the collegium system for appointment of judges, saying that the gates for aspiring judges from certain communities in this country are shut.
Union Minister and Rashtriya Lok Samata Party chief Upendra Kushwaha today joined other BJP allies in asking the government to file a review plea in the Supreme Court against its order on SC/ST Act.