It took 8 years for production team including Aamir Khan to get the rights from Robert Zemeckis (Director of Forest Gump) for making this hindi remake. Aamir had also approached Steven Spielberg to put in a word to Robert Zemeckis to allow for a hindi remake.
Aamir Khan, Kareena Kapoor Khan and Mona Singh reunited after 3 Idiots (2009). Mona Singh played Kareena's elder sister in that film and was depicted as being slightly older than Aamir Khan's character. In this film she played his mother. She is much younger than him in real life.
This is the first indian film whose trailer was shown on the IPL(Indian premier league) final.
Aamir Khan and his team had filmed some scenes at Jatayu Para in Chadayamangalam near Kollam which is famous for its giant rock sculpture of Jatayu, the mythical bird in Ramayana.
The film was shot in around 100 different locations over the world, including India and Turkey.