"Today in front of Rahul Gandhi I joined the Congress, I felicitated him in traditional Mithila style," Azad tweeted, along with photographs of him with the Congress president.
Azad was to officially join the opposition party on Friday, but the programme was cancelled in the wake of the Pulwama terror attack.
He was suspended by the Bharatiya Janata Party (BJP) in 2015 after he levelled allegations against Union Finance Minister Arun Jaitley in connection with alleged irregularities in the Delhi and District Cricket Association (DDCA).
Azad is currently serving his third term in the Lok Sabha, representing the Darbhanga constituency in Bihar.
He is the son of late Bhagwat Jha Azad, a veteran Congress leader who also served as the chief minister of Bihar for a brief period.
Former cricketer Azad said," I had never spoken against BJP, I was expelled from the party for raising my voice against corruption in DDCA during 15 to 20 years of Arun Jaitely's as Association head. Few members of BJP came to me three months back and asked me to contest election from BJP, but I refused. Now Congress will decide whether i will contest election from Darbhanga or not."
