Filmmaker Karan Johar, otherwise known for his jovial and friendly nature, has hit back at people making comments on his personal life on microblogging site Twitter.

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"While most tweets are objective, frank and warm... the ones that are constantly making tactless statements about my personal life are upsetting," Karan wrote.

"Critical appraisal and analysis is more than welcome...but insinuations and comments about my life, choices and orientation are NOT...," he added.