Hilary Duff has been on top of her mom game for 10+ years now, and the recent advice she shared for new parents about newborn life is so accurate it almost hurts.

During a recent visit on The Kelly Clarkson Show, Clarkson asked Duff about dishing out parenting advice to her friends. Duff answered humbly that while she doesn't know it all, she knows enough after being a parent for a decade.

Related: Let’s all take a moment to sympathize with Hilary Duff on an airplane with her baby

One of those nuggets of advice? Don't let the first two weeks of your newborn's life fool you.

“Don’t get fooled by the first two weeks because you have an angel baby. They just haven’t woken up yet,” Duff said to Clarkson.

“You have those friends who are like, ‘This baby is sleeping through the night,’” she continued. “Just wait two weeks. They don’t know they’ve entered the world yet.”

Duff shares daughters Banks, 3, and Mae, 16 months, with her husband, musician Matthew Koma. She shares 10-year-old son, Luca, with her ex-husband Mike Comrie.

I remember both of my daughters kinda cruised through that first week or two after we brought them home from the hospital. Then by week three, the gas had set in. And when the gas sets in, LOOK OUT. They realize they're in the world, it's cold, they're always hungry, and their tummy hurts. And they let you know it, 24/7.

Related: Mom relieves baby’s gas like a pro in viral TikTok

Clarkson concurred, and even admitted that her daughter, River, 8, convinced her she had an "easy" kid for the first year of her life.

“The first year, you’re like, ‘They’re the kindest, they’re so nice,’” Clarkson said. Then she used her hands to make devil horns—which is honestly so apt for toddlerhood.

Duff and Clarkson also discussed how much easier it is for babies to try new foods and like them vs. toddlers, who are notoriously picky beings that subsist on dino nuggets and mac and cheese and not much else.

Oh yeah, my friend will be like, ‘My daughter’s eating curry and green things,’” Duff replied. 

“Enjoy it,” Clarkson said, “Because soon it'll be ‘I hate this.’”

As a mom of two who is now deep into the "I hate this" phase of toddlerhood, I agree with Hilary Duff and Kelly Clarkson.

Related: Your expert guide to 12 months of baby sleep and rest