This Is the Sunscreen Jennifer Garner Swears By

There are few celebrities as ageless as Jennifer Garner. Seriously, she barely looks a day over 30, let alone her true age: 46.

The Southern-bred starlet recently spoke with Allure about her secret weapon for ageless skin, and we were shocked to learn that her trick is not only simple, but affordable too.

Her secret? Sunscreen!

"There's something about the hubris of being 22, that makes you think you don't need sunscreen—you do, I promise you," Garner said. "When you're in your late 30s, any sun damage you've ever had shows up. But by the time it shows up, it's too late—all you can do is protect yourself from then on, which does matter, but my gosh! If I had just known at 20, how important sun protection was, I would have been as vigilant as I am now."

The trick, she added, is making sunscreen as essential to your daily routine as brushing your teeth. "You don't have intentions to brush your teeth, then not brush them," she joked. "We all brush our teeth, every single day. [Sunscreen] has to be as non-negotiable as brushing your teeth."

WATCH: What to Do if You Eat a Hot Pepper Like Jennifer Garner

As for her sunscreen of choice, Garner told Allure that she got hooked on sunscreen when a makeup artist religiously applied Neutrogena Ultra Sheer Dry-Touch Sunscreen to her skin every day on set—even when they were filming inside. "She told me, 'You won't even notice that it's there. It doesn't change the look of the makeup, it's so light, it's so sheer, and it just keeps you protected,'" Garner recalled.

And she’s never looked back!