"I don't think like that. It was more a need of the script," Santoshi said here Friday at a press meet of the film.
"In that film ('Ajab...'), Katrina (Kaif) was a big fan of Salman and an incident happens where Salman comes in front of her. In this film, Shahid has been shown as a big fan of film stars, particularly Salman, one of the most happening stars today.
"So it is just a co-incidence, not because of the lucky mascot thing," he added.
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However, Santoshi says if "Phata Poster Nikla Hero" works, then he will definitely start calling Salman his lucky mascot.
"I wish it happens, success repeats itself. Then third time I will definitely go to Salman saying that you are lucky for me, come in my film and do a scene," he said.
"Phata Poster Nikhla Hero" stars Shahid Kapoor in the lead besides Ileana D'Cruz. The film hits theatres Aug 23.