Former Bahujan Samaj Party (BSP) members Daddu Prasad and Isham Singh rejoined the party on Friday.
Daddu Prasad was earlier expelled from the party as he turned rebel against BSP chief Mayawati, accusing her of selling tickets to candidates.
Three time legislator Daddu served as Rural Development Minister in the Uttar Pradesh government between 2007 and 2012.
Isham Singh was the Rajya Sabha member of the BSP and a vice-president of the party.