Bollywood megastar Amitabh Bachchan, 77, tested positive for Covid-19 on Saturday and was admitted to hospital in Mumbai, with his actor son Abhishek - who also announced he had the virus - saying both cases were mild. “I have tested CoviD positive .. shifted to Hospital,” Amitabh Bachchan told his 43 million Twitter followers. “All that have been in close proximity to me in the last 10 days are requested to please get themselves tested!” T 3590 -I have tested CoviD positive .. shifted to Hospital .. hospital informing authorities .. family and staff undergone tests , results awaited .. All that have been in close proximity to me in the last 10 days are requested to please get themselves tested ! — Amitabh Bachchan (@SrBachchan) July 11, 2020 His son Abhishek added “both of us having mild symptoms have been admitted to hospital... I request all to stay calm and not panic”. Millions of Indians revere Amitabh Bachchan, hanging on his every word, seeking his blessings and congregating outside his Mumbai bungalow every year on October 11, his birthday. Affectionately known as “Big B”, he shot to stardom in the early 1970s in huge hit movies such as Zanjeer and Sholay . His films still open to packed cinemas across India, but his new movie - comedy-drama Gulabo Sitabo - was released online due to coronavirus restrictions closing cinemas. Abhishek Bachchan, 44, is also a successful Bollywood actor and producer, and is married to actress and former Miss World Aishwarya Rai. India’s nationwide coronavirus toll rose on Saturday to 820,916 cases - the third highest in the world - with 22,123 deaths. Bollywood cuts kissing scenes, epic dance routines under new coronavirus rules Health workers have complained about stretched facilities and severe staff shortages. Critics say the vast country is not testing enough and many infections are undiagnosed. Prime Minister Narendra Modi’s government has eased lockdown restrictions despite a surge in cases, but he has warned the nation to be more cautious. Bollywood recently resumed film shoots after a months-long hiatus due to the nationwide lockdown since late March. Amitabh Bachchan is the doyen of India’s movie industry, and his career has branched into television presenting, business and politics, as well as countless commercial endorsements. Early in his acting life, he earned his reputation as India’s “angry young man” for portraying violent heroes fighting an unjust system and injecting a new aggressive element into Bollywood movies, which had previously consisted of polite romances. Bollywood actor Rishi Kapoor dies at 67 after leukaemia battle After some lean years, Bachchan bounced back spectacularly, largely due to his stint as host for the Indian version of the TV game show Who Wants To Be A Millionaire? , which revived his artistic and financial fortunes. According to local media, he was being treated at Mumbai’s Nanavati hospital. As best wishes poured in on Saturday, former Indian cricket star Sachin Tendulkar tweeted “praying for your good health and quick recovery”. The Mumbai region, which accounts for about a quarter of India’s virus deaths, has suffered a new surge in infections, forcing authorities to build makeshift hospitals and quarantine facilities.