The

Frozen

star - who has two daughters, three-year-old Lincoln and 15-month-old Delta with husband Dax Shepard - says her household is always noisy because her two children wake up "screaming bloody murder".

She said: "It's a circus. It's a circus for sure. I love it. I love them. But, you know what? You know where we could do better? Why does everyone wake up screaming?

"Like, why don't they tell you that? Like, 'they're going to wake up screaming for, like, four years.' You wake up - the moment you wake up, you're in, like, a horror movie, because everyone in the house is screaming bloody murder!"

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And the 35-year-old actress believes becoming a mother has made her more health conscious.

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Speaking on The Ellen DeGeneres Show, she added: "I'm so into health food and just just healthy living that my girlfriends and my friends, I feel like, are a little bit over it. Because I'll walk into the room and be like, 'You guys, does everybody know about selenium?'"

- Bang! Showbiz