Spielberg shared everything from photos to home movie footage with his cast in preparation for their roles.
Both Williams and Dano consider the footage and memories Spielberg offered essential to their work.
He was a computer engineer.

Paul Dano and Michelle Williams in ‘The Fabelmans’.Universal
Meanwhile, the part of Mitzi that Williams tapped into was more of a sensory experience.
“One of my favorite things to do was to listen to her laugh,” she explains.
“It was one of my touchstones that I would use like right before we would shoot.
Spielberg was delighted to discover that everything he shared with his cast was as useful as he had hoped.
Watch the exclusive clip above for more.The Fabelmansis now available on digital and hits Blu-ray on Feb. 14.