The 36-year-old, who adopted the baby boy named Jackson, said without the help of her mother she would have struggled to balance film work with diaper duties, reported Contactmusic.
"She has taken to the role of grandmother like a fish to water. I have moments where I look at her and go, 'Were you this nice to me?' It heightens your relationship, which is really bizarre because I didn't think I could get any closer to my mum.
I would not be able to do this without her.
"Right now, like any working mum, I've been just trying to figure out how to juggle everything. But I know what my priorities are. This is everything that I've dreamed of and about for a really long time," she said.