Megastar Amitabh Bachchan says he is shocked to hear about star cricketer Yuvraj Singh's illness and prays for his well being.

"Shocked to learn of Yuvraj Singh down with cancer..Yuvraj if you read this, know that we all pray for you..All shall and will be well," Amitabh wrote on his Twitter page.

Yuvraj has been diagnosed with a malignant tumour in his lung and is currently undergoing chemotherapy at the Cancer Research Institute in Boston, US.