After much persuasion from megastar Amitabh Bachchan, Bollywood actor-producer Aamir Khan has finally decided to join micro-blogging website Twitter July 1. “Aamir will be on Twitter from July 1. He was not on Twitter till now because he thought he won't be able to give enough time to it. But since Mr. Bachchan insisted on him joining it, he gave it another thought and has decided to join it. He cannot say no to Mr. Bachchan,” said a source close to the actor. Aamir met Amitabh and his actress-politician wife Jaya over a casual dinner in London last week and Amitabh started persuading him to join the site. He even taught him how to send Tweets through his phone. The actor's username on Twitter would be aamir_khan.