Some of our favorite stars have clearly stumbled upon the fountain of youth. How else do you explain the fact that they seemingly don't age? Wonderwall.com is taking a look back at some of our favorite ageless celebrities, starting with this former teen idol: Mila Kunis wowed with her youthful appearance at the premiere of "Wonder Park" in Los Angeles on March 10, 2019, more than a decade after she attended a party for the final episode of "That '70s Show" in 2006. Can you believe the mother of two turned 35 in 2018?! She looks practically the same! Now keep reading to check out more of Hollywood's ageless wonders…
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The difference between Natalie Imbruglia on the left in 1993 and on the right in 2019, when she turned 44, spans 26 years. But she looks like she's barely aged!
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Pharrell Williams might be 45, but you'd never know it from just looking at the musician-producer and former "The Voice" coach (who looks nearly the same as he did back in 2005!).
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Rachel Bilson shot to fame in 2003 when she landed the role of lovable Summer Roberts on "The O.C." She's been in Hollywood now for more than 15 years yet the mother of one looks like she's hardly aged a day.
Gabrielle Union could still pass for a high school student even though her cheerleading days are long behind her. Whatever beauty routine this 46-year-old actress is following, bring it on!
Former supermodel Christie Brinkley may not have stayed Billy Joel's "Uptown Girl" forever, but she sure has retained her girlish looks since the '80s. This gorgeous lady turned 64 in 2018!
Will Smith may be the movie king as far as Hollywood is concerned. But as far as we're concerned, the 50-year-old actor will always be the Fresh Prince of Bel-Air — because he looks like he's barely aged since the show went off the air in '96.
The only thing that's changed about 51-year-old Julia Roberts in the past 17 years is her hair.
If you really want to be our "Hero," Enrique Iglesias, you'll explain to us how you're 43 and haven't aged in the past decade.
LL Cool J has given up on over-the-top fashion since the early '90s, but the 51-year-old rapper-actor hasn't given up on looking like he's in his 20s.
Eva Mendes just keeps getting better with age! The 45-year-old beauty looks even better now than she did back in 2004.
Have mercy! If this is what 55 is supposed to look like, we're all in trouble. Thanks a lot, John Stamos.
Kate Hudson's passion for plunging necklines isn't the only thing that's gone unchanged since 2003. She may favor more dramatic makeup these days, but at 39, her face looks just as youthful as ever.
Yep, Stacey Dash was almost 30 when she starred as Dionne in "Clueless." The 52-year-old actress is clearly the most stunning freak of nature ever.
Scott Wolf, 50, hasn't seen much success on the small screen since his "Party of Five" days, but hey, at least he's still got his boyish Bailey Salinger looks!
Two things haven't changed for 62-year-old Vanna White since 1983: her ability to turn letters like a pro on "Wheel of Fortune" and her youthful appearance.
This 50-year-old actress is like a fine wine! She just gets hotter and hotter with age. We wonder what Lucy Liu's secret is…
Tobey Maguire's facial hair may make him look a few years older, but as long as he keeps rocking the same hairstyle he sported back in '02, he'll look more like a Spider-Boy than Spider-Man — even though he's 43 now!
Michelle Williams might have starred on "Dawson's Creek" more than 15 years ago, but to us, she'll always be Jen Lindley — mostly because she looks exactly the same now at age 38 as she did when the show ended.
Much like the elf she played in the "Lord of the Rings" trilogy, Liv Tyler is immortal and impervious to aging. She's the youngest looking 41 year old we've ever seen!
How do we explain 49-year-old Edward Norton's ageless appearance? Well, the first rule of being a vampire is you do not talk about being a vampire. The second rule of being a vampire is…
When she got her start in Hollywood, Reese Witherspoon was a cherub-faced beauty. Decades later, nothing has really changed — and she turned 42 this year!
At 42, Alicia Silverstone is clearly anything but "Clueless" when it comes to making herself look as fresh-faced now as she did back in 1997.
Patrick Dempsey thankfully ditched the unruly 'do he favored in the mid-'90s. Other than that, he looks practically the same — if not better! — at age 53 than he did in his 20s.
Can you believe Ralph Macchio is 57?! His youthful looks are pretty shocking — especially when you do the math and realize that when he made "The Karate Kid," Ralph wasn't a kid at all! The '80s star was already in his 20s when he took on the star-making role.
Did a glitch in the matrix give Keanu Reeves the ability to look young forever? The actor is 54!
Michelle Pfeiffer has played everything from a high school student to a high school teacher — and she's kept her youthful looks all the while. Could you have guessed she turned 60 this year?
You'd think that years of hard rockin' would have aged Jon Bon Jovi. Not so! He's still looking young and fresh at 57.
She may be a 49-year-old mother of three, but Gwen Stefani still looks like she's "Just a Girl."
Technically, we watched Elijah Wood grow up in the spotlight — but we're using the term "grow up" lightly. The 38-year-old actor has had the same baby face for years!
Thanks to her forever-young face, Naomi Campbell has been one of fashion's top models since the mid-'90s. Even today, the 48-year-old beauty barely looks a day over 30.
He's been around since the '80s — and survived some hard living — but Rob Lowe has maintained his youthful glow. How does the 54 year old do it?
Jennifer Aniston has worked steadily since the late '80s, but there's not much of a difference in her appearance from 1997 to today. If only all of us could look as great as the 50-year-old "Friends" alum!
Thi boyishly good-looking "Revenge" alum is 46 years old! It must be the blonde hair and baby blues that make Gabriel Mann look so young.
Demi Moore, 56, looks almost the same as she did during her days as a member of the Brat Pack.
Jennifer Lopez has been in the biz for nearly three decades, but you'd never know it based on her looks! The 49-year-old stunner looks like she's barely aged a day since stepping out in her famous Versace Grammys ensemble in 2000. Give us all your secrets, girlfriend!
It's hard to believe this 47-year-old Oscar winner has been alive for more than four decades. Jared Leto barely looks a day older than when he first burst onto the scene in the mid-'90s.
Maybe we can chalk it up to her Goop lifestyle, but Gwyneth Paltrow looks like she's hardly aged since 1997. The 46-year-old mama is certainly genetically blessed!
Paparazzi camera flashes must have preservation powers because Tom Cruise looks just as good today as he did decades ago. Talk about a 56 year old with good genes!
As you can see, there's not much difference between 1998 Shania Twain and 2018 Shania Twain… what's her secret?!
Elle Macpherson may be known as The Body, but you've also got to give her credit for her face. It hasn't aged a bit. And she's 54!
Paul Rudd played Cher's college-age stepbrother in "Clueless." Somehow, he still looks like he could fit in on campus — even though he's 49 now.
Decades after her pageant days, Halle Berry's award-winning beauty is still perfectly intact. Isn't she flawless at 52?
Former Miss America Vanessa Williams could easily take on the pageant circuit at age 55.
Angela Bassett is the definition of an ageless wonder! Believe it or not, the "American Horror Story" star is 60!
Mario Lopez still has the same baby face he had during "Saved By the Bell." And the "Extra" host is 45 years old!
Salma Hayek has not aged a day! The star, who's in her early 50s, looks like she's discovered the fountain of youth!
Cindy Crawford is just as stunning today as she was in the 1980s. The supermodel is a beautiful 53 years old!
Bianca Lawson has been playing a teenager for over two decades! Believe it or not, the "Queen Sugar" star is 39 years old.
Jaclyn Smith has aged gracefully! The former "Charlie's Angel" star, 73, looked ageless while doing some shopping compared to a promo shot from her show from more than four decades ago.