Indian Bollywood actors Amitabh Bachchan (left), Abhishek Bachchan (center) and Aishwarya Rai Bachchan (right) look on during the store launch of the fashion label MXS in Mumbai, India, on Sept 1, 2018. (SUJIT JAISWAL / AFP)

MUMBAI - Bollywood actress Aishwarya Rai Bachchan and her daughter tested positive for the new coronavirus on Sunday, a day after her father-in-law and top Indian actor Amitabh Bachchan and her husband and actor Abhishek were hospitalised for COVID-19.

Maharastra state health minister Rajesh Tope said in a tweet that Aishwarya and her eight-year-old daughter had tested positive for the virus that causes the disease.

It was not clear whether they had been admitted to hospital, as Amitabh and Abhishek were on Saturday, when they said they had mild symptoms.

Indian Bollywood actress Aishwarya Rai Bachchan (left) and her daughter Aaradhya Bachchan pose during an event with NGO Smile Train India to bring awareness about cleft lip and palate, in Mumbai, India, on Nov 20, 2019. (SUJIT JAISWAL / AFP)

Hospital officials and government health authorities said earlier on Sunday that Amitabh and his Abhishek were in stable condition.

Aishwarya, 46, a former Miss World who often features on "most beautiful" lists, has worked on several Bollywood and Hollywood films. She is a brand ambassador for several multinational companies.

India on Sunday registered a record increase in the number of novel coronavirus cases taking the total number of affected people in the country to nearly 850,000 forcing authorities to re-impose partial lockdown in some densely populated areas.

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In this file photo taken on Nov 22, 2011, Bollywood actors Amitabh Bachchan (right) and his son Abhishek Bachchan hold a press conference in Mumbai. (PHOTO / AFP)

The 77-year-old legendary actor Amitabh said in a tweet on Saturday night that he had tested positive for the virus.

Within minutes, his actor son Abhishek Bachchan, 44, tweeted that he had also tested positive.

Both were moved to the Nanavati Hospital in Mumbai despite showing only mild symptoms and the father-son duo appealed to their millions of fans to stay calm.

Authorities launched a massive sanitising drill at Bachchan's upscale residence in Mumbai, spraying disinfectant in the large compound and on cars parked there.

A civic worker sanitizes the gate of Bollywood superstar Amitabh Bachchan's residence after Bachchan and his son Abhishek Bachchan tested positive for the coronavirus and were hospitalized in Mumbai, India, July 12, 2020. (RAFIQ MAQBOOL / AP)

Amitabh Bachchan has been a prominent figure in the fight against the coronavirus by appearing in public service advertisements in which he urges people to wear a mask, wash hands frequently and maintain social distance in his trademark baritone.

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But actors over 65, such as Amitabh, are banned from the sets because of their vulnerability to the virus.