Director R Balki has worked with Amitabh Bachchan in all his films so far but he feels it is unfair to call the megastar his 'lucky mascot'.

Balki directed Bachchan in 'Cheeni Kum', 'Paa' and 'Shamitabh'. In his upcoming film 'Ki and Ka', Bachchan and his actress wife Jaya make a special appearance.

"I don't think he will be very happy about it (calling him lucky mascot). He is not a mascot he is Amitabh Bachchan. He is country's greatest actor," Balki replied to a poser at the trailer launch of 'Ki and Ka'.

Balki also did not wish to talk about the guest roles of the Bollywood's veteran star couple in the Kareena Kapoor-Arjun Kapoor starrer.

"There is special appearance of him and Jaya. I don't want to talk about it... The essence of what we want to say is in this film is there in that scene," Balki said. The romantic-comedy will release on April 1.