Megastar Amitabh Bachchan has revealed that he will undergo abdominal surgery Saturday.

"There were some medical procedures today as well for -- and this is being disclosed to the Ef (extended family) at this point of time -- a surgery that I shall be undergoing on the 11th morning. I do not wish to talk much on my medical condition, but trust and faith in my FmXt (extended family) allows me to do so," Amitabh wrote on his blog bigb.bigadda.com.