Steven Spielbergwas inspired by his own life forThe Fabelmansand the casting of the film was personal.

Michelle Williamsplays Mitzi Fabelman, a character inspired by Spielbergs mother.

The director said that Williams earned the role after he watched her on the FX seriesFosse/Verdon.

Michelle Williams in ‘Fosse/Verdon,’ Steven Spielberg and Williams in ‘The Fabelmans’

(L-R) Michelle Williams in ‘Fosse/Verdon,’ Steven Spielberg and Williams in ‘The Fabelmans’Michael Parmele / FX / Courtesy Everett Collection / Kevin Winter / Getty Images / Merie Weismiller Wallace / Universal Pictures

That went a long way into making her my first choice to play Mitzi.

My husband was in the room with me, and I kept saying, Its just getting better.

And this was just page after page of that, just this undulating, gorgeous aliveness.

WGA West building in Hollywood

When I finished, I said to my husband, Its a feast.

They made her a feast.’

I prep a lot before a movie, and there was so much to grab hold of.

It felt more akin to making a mini-series because the material was so rich.