Reese Witherspoon Makes 42 Look Like 30 With This Simple Trick

It's been 17 years since the release of Legally Blonde, and with Reese Witherspoon announcing that Legally Blonde 3 is officially in the works, we couldn't help but wonder: How does that woman look exactly the same as she did in 2001?

The 42-year-old has shared many aspects of her healthy lifestyle, and she's clearly doing something right. We know that she regularly hikes mountains, practices yoga, enjoys green smoothies, and even told People her one beauty product on a deserted island would be sunscreen.

Also, she and her 18-year-old daughter are practically twins.❤️

But Witherspoon's greatest anti-aging secret may be even simpler: She takes a water bottle practically everywhere she goes.

Seriously-everywhere.

Imagine having this level of commitment to hydration.

Water is crucial for youthful skin

"Drink lots of water" is one of those health rules we all know about but often slack on. Yet the fact remains: Drinking water doesn't just help you lose weight, boost physical and mental performance, lubricate and cushion your joints, help filter waste out of your body, and keep your temperature at a normal level-it's also excellent for your skin. Many people find that drinking more water leaves their skin extra radiant and even helps clear acne and blemishes.

"One of the most important things I remind my patients is that your skin really is an outward sign of your internal health. The best anti-ageing trick is to be healthy (and sun protect, of course). Hydration is just one, but important, part of that," says Dr Tara Rao.

"On average, our bodies are roughly 60 percent water," Dr Rao tells Prevention. "Water is important for healthy function of all vital organs and to maintain proper blood pressure. So drinking water, eat hydrating fruits and veggies, and keeping dehydrating things like coffee and alcohol at the minimum are great."

Is there such a thing as too much water?

While 6 to 8 cups of water every day is a good rule of thumb for most people, there's no need to go overboard on H2O to make a positive difference, say Dr Rao. "One can drink too much water, so don't overdo it!" she says. "The reality is that the amount of water needed depends on various factors, such as an individual’s weight, activity level and underlying medical problems."

An easy way to measure how hydrated you are: "Be mindful of your thirst and the colour of your urine-the lighter the pee, the better!" says Dr Rao.

Most people don't even feel thirsty until they're already dehydrated, especially older adults, according to the Mayo Clinic. Consider this a much-needed reminder for all of us!

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