All India Forward Bloc leader and West Bengal lawmaker Udayan Guha joined the Trinamool Congress on Thursday.
"He has joined Trinamool. We have inducted him as a secretary of the party," said Chief Minister Mamata Banerjee, who is also the Trinamool supremo, at the Netaji Subhas Chandra Bose International Airport, with Guha by her side.
Guha, who represents Dinhata in Cooch Behar district, had on Wednesday sent an SMS to his party bigwigs announcing his decision to quit the party.
Regarded as Forward Bloc's face in north Bengal, Guha had fallen out with the party leadership for some time.