Leslie Mann and Maude Apatow Shared the Skin-Care Rule That's Been In Their Family for Generations

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Leslie Mann and Maude Apatow share a love of skin care in addition to their passions for acting. In honor of Mother's day, the mother-daughter duo recently spoke with Today about how they keep their skin healthy. In the interview, they even spilled the skin-care tip that's been passed down through generations in their family.

Mann's mother and grandmother passed along the importance of skin care to her, she said in the interview. One thing she'll never forget about the women in her life is how seriously they took their skin care. "I watched [them] be really good about moisturizing, drinking lots of water, and being healthy and taking care of themselves," Mann told the publication. "So, I did the same and encouraged my kids to do the same." (Related: The 10 Best Hydrating Skin-Care Products for Melanated Skin)

It wasn't until Mann stressed the importance of moisturizing that Apatow decided to take it more seriously. "I never used to moisturize," said the Euphoria star during the interview. "There was a moment when you told me I needed to moisturize, Mom. Since then, I've always done it." Moisturizing has now become her "number-one must-do thing every day," said the 24-year-old actress. (Related: The 10 Best Body Lotions for Dry Skin, According to Reviews)

Apatow was smart to start moisturizing her skin, since doing so is necessary, no matter your skin type, according to the American Academy of Dermatology Association. "Moisturizing products help to prevent trans-epidermal water loss — aka moisture that evaporates from your skin — reinforcing your skin's barrier function," Meghan Feely, M.D., F.A.A.D., a board-certified dermatologist in New Jersey and New York previously told Shape. A functioning skin barrier is important, because it's like a wall that keeps bad things (e.g. bacteria) outside of the body and good things (e.g. moisture) in, explained Dr. Feely.

In case you needed any more confirmation that moisturizing is worthwhile, the practice helps to prevent and reduce dryness and premature signs of aging, according to the Mayo Clinic. Just be sure not to go overboard, Mann pointed out in the interview. "Sometimes I overdo it, though, and it looks super greasy," she joked. "That's one of your signature looks," teased Maude.

Bottom line? Whether your go-to form of moisturizing involves slathering on products, like Mann, slugging (IYKYK), or sticking to a lotion with simple ingredients, take it from this mother-daughter duo: Moisturizing is a necessary step in any skin-care routine.