Being a real-life mom to now 5-year-old Rose helpedScarlett Johanssonportray a parent on the big screen twice in 2019.

Its a parents job to protect their kids, Johansson told EW and PEOPLE at TIFF.

I think that by not involving Romans character in the reality of whats going on at home…

I think Im basically keeping him alive that way.

Ive never had a child in [a] film before.

Being a parent myself was just invaluably helpful to me.

I had empathy for Rosies plate that I may not have had insight on otherwise.

She was just a joy to play.

Shes a warm, lovable character that felt really comfy to me.

And I wanted that to come across, that shes just comfortable and kind of sugary and warm.

The Disney title is set to hit theaters on Oct. 18.