Ryan Gosling practiced nonstop in order to play all the piano pieces by heart and have no need of a double.
In creating the aliens, octopuses, whales, elephants, and spiders were all used as inspiration.
Dev Patel's first audition for the film lasted six hours and was almost not chosen due to producers' worries he'd be the "obvious choice."
Despite the film being set in the state of Texas, not a scene of it was actually shot there.
After seeing the film, the real Katherine Johnson liked it but didn't see why they'd want to make a film about her life.
In a scene in the movie, Mahershala Ali really is teaching Alex R. Hibbert how to swim; he didn't know before filming.
This movie features the film debut of Milo Gibson, Mel Gibson's son. It is their first collaboration.
Manchester-By-The-Sea is a real town in Massachusetts, which was called Manchester until 1989.
Both Viola Davis and Denzel Washington portrayed their film roles in the revival of the stage play in 2010.