United Kingdom, May 30 -- Elizabeth Banks struggles to find time to sleep as a busy mother.

The 51-year-old actress has sons Felix, 14, as well as 12-year-old Magnus with her husband Max Handelman, and while she loves to lie in bed as long as possible, it's sometimes impossible because of her children's schedule and she often resorts to going to sleep before them just to get enough rest.

She told PEOPLE: "I'll go to bed late if I can sleep in. But how often does a working mom get to sleep in? Sleep has become a determinant of so much of my daily life. My mood is improved, my ability to work is improved, my focus is improved if I have a good night's sleep. What that means to me is seven to eight hours minimum. I'm sort of at the mercy of...