Big B met her at the book launch of designer duo Abu Jani and Sandeep Khosla at Sotheby's in London Sep 5.
"Dame Judi Dench, was a delight to have been introduced to. A soft spoken, keen listener, and a complete sport when the lady Mc (emcee) of the evening mispronounced her name as 'Dame Bench'!" Amitabh wrote on his blog srbachchan.tumblr.com.
The book launch was followed by a charity auction where various items, including Amitabh's sherwani and a large black and white photograph of his, were up for grabs.
"The auction went well, and to great admirers of the produce up for sale - a large black and white photograph of mine, self autographed books, and my sherwani that I wore. The sherwani went for the most, after I cautioned all that it was the clothing that up for auction not the one that was wearing it!" he wrote.
"The money for the auction goes for a charity called 'Breakthrough' which protects the girl child. Protects them against violence and atrocities committed against them, a factor which has gained great significance lately among the learned, and those unaware of such deeds...
"It interests me greatly, not just because I am Ambassador for UN for the girl child, but because I have genuine belief in it. In many of our campaigns for KBC (Kaun Banega Crorepati), this is what has been highlighted and this is what encourages us to be able to spread awareness to the rest of the world!!" he wrote.