Answer
The answer is "Om Shanti Om". Released in 2007, "Om Shanti Om" is a popular Bollywood film directed by Farah Khan that prominently features a retro-reincarnation theme. The central plot revolves around the reincarnation of a 1970s actor, played by Shah Rukh Khan, who is reborn in the present day and sets out to reclaim his lost love from his previous life while navigating the challenges of the film industry.