On 'Amar Akbar Anthony' completing 41 years since its release on May 27, 1977, actor Rishi Kapoor tweeted that a film like this comes once in ages. "Fortunate to be a part of it," he added. Directed by Manmohan Desai, the film starred Rishi, Amitabh Bachchan and Vinod Khanna as the male leads.