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The official change of name and faith occurred only days before the release of Roja. In fact, in the title sequences of even the final edit of the movie, AR was credited under his old name. ‘Literally just before the release,’ remembers Trilok Nair, ‘we got a call from Amma saying his name in the movie had to be changed. It was a pretty big request to make so late in the day, but she was particular about it. She said it really, really mattered to her personally. In fact, she would’ve rather not had his name appear at all, than not have his new name appear on the credits.’ So Trilok Nair called up Mani Ratnam and asked if he could make the change AR’s mother was asking for. Eventually, Mani Ratnam agreed. ‘If it means so much to this boy,’ he said, ‘I’ll get it done.
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Krishna Trilok (Notes of a Dream: The Authorized Biography of A.R. Rahman)