Aamir Khan's much-awaited next film 'Laal Singh Chaddha' is a Hindi remake of 1994 American classic 'Forrest Gump', which starred Tom Hanks in the titular lead role. 'Forrest Gump' itself was based on a Winston Groom novel of the same name. Aamir has a reputation of being thoughtful about his choices of movies, and his films usually do great business (it is another matter that his last 'Thugs of Hindostan' was a huge flop). This is why many are nonplussed at 'Laal Singh Chaddha', which also stars Kareena Kapoor, Naga Chaitanya, and Mona Singh, and wonder why Aamir would choose to remake a movie that is so popular and that many Indian moviegoers have already seen.
But then Bollywood has a 'glorious' tradition of remaking Hollywood and other overseas movies, and more often than not, the credit is not given. Here are some of the other popular movies that you likely did not know were remakes. Keep in mind that even remakes, even the uncredited ones, have the potential to be great. And these indeed are quite good.