TIL John Krasinski fought for a deaf actress Millicent Simmonds to be cast in 'A Quiet Place'; she taught everyone sign language on set.
John Krasinski Insisted Deaf Actress Be Cast In 'A Quiet Place'
https://www.huffpost.com/entry/john-krasinski-insisted-deaf-actress-be-cast-in-a-quiet-place_n_5ac94beae4b07a3485e5539e
The film's star and director wanted the character, played by deaf actress Millicent Simmonds, to be authentic.