Boys Online

Siddharth - Munna (as R. Siddharth Narayan) , Nakhul - Juju (as Nakul) , Bharath Srinivasan - Bob Galy / Babu Kalyanam, S. Thaman - Krishna (as Thaman S.) , Manigandan - Kumar (as Manikandan) , Genelia D'Souza - Harini (as Harini) , Vivek - Mangalam Sir, Senthil - Anna Veri Kannaiyan, A.V. Ramanan - Munna's Father, Janaki Sabesh - Munna's Mother, Anitha Rathnam - Harini's Father, Kalairani - Kumar's Mother, Ilavarasu - Kumar's Father (as Havarasu) , Subashini - Juju's Mother, K.P. Mohan - Juju's Father