Ray's fourth film, Jalsaghar (1958) to watch the shoot. He was unaware that he had already been selected for the title role in the Apu trilogy. That day, while he was leaving the sets, Ray called him over and introduced him to actor Chhabi Biswas as "This is Soumitra Chattopadhyay; he's playing Apu in my next film Apur Sansar" leaving him much surprised. Despite being selected, as a debutant actor, Chatterjee was nevertheless unsure of his career choice and especially his looks, as he didn't consider himself photogenic. However, on 9 August 1958, when the first shooting of the film was accepted in a single take, he realized that he had found his vocation. Thus Soumitra's film debut came in 1959 in Satyajit Ray's The World of Apu (Apur Sansar). In fact Ray believed with a beard Chatterjee looked like young poet laureate Tagore. Soumitra would go on to collaborate with Ray in fourteen films. His centrality to Ray's work is akin to other key collaborations in the history of cinema — Toshiro Mifune and Akira Kurosawa, Marcello Mastroianni and Federico Fellini, De Niro and Martin Scorsese, Leonardo DiCaprio and Martin Scorsese, Max von Sydow and Ingmar Bergman, Jerzy Stuhr and Krzysztof Kieślowski, Klaus Kinski and Werner Herzog. After Apur Sansar, he also worked with Sharmila Tagore in a number of Ray's films, apart from working with leading star actor of the period, Uttam Kumar, with whom he has often been compared, in eight films. Chatterjee was cast in diverse roles by Ray and some of the stories and screenplays that Ray wrote were said to be written with him in mind. Soumitra featured as Feluda/Pradosh Chandra Mitter, the famous private investigator from Calcutta in Ray's Feluda series of books, in two films in the 1970s Sonar Kella (1974) and Joi Baba Felunath (1979). These two films were the first film series made for Feluda and are considered as the Feluda original film series. He was the first person who portrayed the iconic Bengali sleuth Feluda. Satyajit Ray made some illustrations of Feluda based on Soumitra's body figure and look in the 1970s Feluda books. After him Sabyasachi Chakrabarty took the role of the iconic Bengali hero Feluda in the mid-1990s. Soumitra had approached Satyajit Ray to suggest a name for a little magazine founded by Soumitra and Nirmalya Acharya in 1961. Satyajit Ray had named the magazine Ekkhon (Now),