Mumbai - We all know that its impossible to resist the charm of megastar Amitabh Bachchan, who has a huge fan following worldwide, but much to the surprise of the Shenshah of Bollywood, kids as young as four-month-old are his big admirers. During his recent visit to London, the superstar was chased by a man who came to tell him that his four-month-old son is his biggest fan. Car in London chases me to stop. Gentleman comes down and says 'My son your biggest fan, just a hi to him'. Gentleman brings out 4 month baby, the 69-year-old wrote on his Twitter account.