Is Allu Sirish replacing Naga Chaitanya in Gauravam? Yes, says the buzz. Allu Sirish is  likely to make his debut as hero in director Radha Mohan's new movie 'Gauravam' which is a bilingual in Telugu and Tamil languages. It is speculated that Radha Mohan is unhappy with some sudden developments and as a result he has chosen Allu Sirish as a replacement to Naga Chaitanya. Recently, Radha Mohan has narrated the storyline to producer Allu Aravind and got the go ahead nod from the mega producer, says filmnagar sources. Let's wait till we get an official announcement on 'Gauravam'.