Malayalam actor Mohanlal, in an interview with Galatta Plus, recalled performing Kathakali in 'Vanaprastham' even though he wasn't trained in it. "Even Amitabh Bachchan asked, 'Mohanlal, how did you do the Kathakali?'" the actor recalled. "I said, 'Sir I don't know'," he added. Mohanlal said he doesn't give strain to his thought process and brain by preparing a lot.