of the team to keep her role a surprise and that Hirani "made it clear to [her] that [her] role would create a lot of speculation" as it is "exactly what [they] had anticipated." Boman Irani expressed that he was cast as Hirani wanted him to do a special appearance. Speaking about his character, Irani stated that "it's not a known character but may have existed". Characters Ranbir Kapoor requested and was given a month's break between every phase to complete his transformation into Dutt. Speaking about it at the teaser launch of the film, he stated that it was hard for him to look like the muscular Dutt as Kapoor has a thinner frame. "...there was a lot of team effort behind this. A year before that we did a lot of prep and screen tests..." In regards to Kapoor's transformation, father Rishi Kapoor revealed that Ranbir "took 6–7 weeks to get each of his different looks". In an interview, prosthetic artist, Dr Suresh Murkey said that he used prosthetics to make Ranbir Kapoor's face and age resemble Dutt's. Kapoor further commented that he would be sitting for hair and makeup for six hours and "tests after tests [they] kept failing". It was also difficult to develop Dutt's ageing process as "because of alcohol, his face had gotten puffy and his chin had kind of come down." Kapoor however, was also "very clear that if we cannot achieve his look, we will not make the film". Mirza also opened up on Kapoor's role stating that "he would be the first to reach the location because he would need five, six hours to do prosthetic make-up to play the older part." She also spoke about the uncanny resemblance of Kapoor as Dutt as a consequence of prosthetics revealing that "people who went on the sets thought Ranbir was Sanju sir. Koirala also expressed that she was "shocked at Ranbir's capacity to transform". Hirani also revealed that Kapoor was "meeting Sanju separately...had a full timeline of how Sanju looked in the 80s, 90s, 2000s... and made a whole collection of look videos." Kapoor himself also stated that he "knew that there is a fine line between mimicry and representing someone who is loved by so many people" which is why "it took us six to eight months to get ready... to prep, do the prosthetic tests, acting and character rehearsals." Kapoor