Like Keanu Reeves and Rob Lowe, Paul Rudd has refused to age like normal humans, as he continues to look the same even after all these years. Recently, he revealed the secret to defying the ravages of age.

The 49-year-old shared the tip while at the Chicago Comic & Entertainment Expo, where he reunited with Clueless costars Alicia Silverstone, Breckin Meyer and Donald Faison. “I’m 80 years old on the inside,” the actor joked when asked how in the world he stays so young.

But what does he do to keep that baby face? “In here, pure darkness,” Paul said while pointing to the chest. “And a little moisturizer,” he added.

No fountain of youth? No bathing in donkey milk like Cleopatra? Well, that seems simple enough. During the classic ’90s movie reunion, the cast acknowledge that another one of their costars, Brittany Murphy, who sadly passed away in 2009 at the age of 32.

“She was so incredibly talented,” Breckin, 44, said of the late actress. “Ridiculously talented. Like, you see [her in Clueless], and then you watch 8 Mile, and you’re like, ‘That’s the same person?’”

Since it has been 24 years since the Amy Heckerling-directed film was released, some of the cast pondered where there characters would be up to these days, and Donald, 44, revealed that he hoped Alicia, 42, and Paul’s characters would still be together — even though they’re step-siblings.

“‘You guys are still together … and you’re still kind of related?’” Rudd joked. The cast has gone different routes since their iconic movie, with Paul arguably having the most success of all. He’s starred in hit after hit — from Anchorman to I Love You, Man to Role Models. He currently stars as Scott Lang/Ant-Man in the Marvel Cinematic Universe, quickly becoming a very popular character.

We’re just going to assume that Paul will look the same in the next Clueless reunion.