Mumbai, Apr 5 (IANS): Millions would run after Amitabh Bachchan to get his autograph, but the megastar is trying to get American singer Katy Perry's signature for his granddaughter Navya Naveli.

Amitabh and Perry were among the star performers at the opening ceremony of the fifth edition of the Indian Premier League (IPL) in Chennai Tuesday night.

"The granddaughter has a fancy for the singer Katy Perry. I hope I have the name correct. Yes just checked, it is right... Navya wants her autograph for she loves her. So efforts are on to make that happen," the 69-year-old posted on his blog bigb.bigadda.com.

It was Perry's maiden performance in the country, and she chose to go desi for her performance. She wore a blingy choli teamed with pink-coloured transparent lowers, and accessorised her look with a maang tika and bindis on her forehead.

Big B, who recited a poem at the ceremony, says he didn't know about the 27-year-old pop icon earlier.

"I would probably get killed for this, but I had not heard of her till last night. The age difference is playing havoc," he added.

The actor, who is a fan of evergreen and classic music by British rock band 'The Beatles', feels "today's grandchildren would 'snuff' at that".