- Some celebrities haven’t aged over the past 20 years.
- Keanu Reeves turned 55 on September 2, but he has defied aging altogether.
- Jennifer Lopez also looks exactly the same as she did in 2000.
- Visit Insider’s homepage for more stories.
We may never know why certain celebrities seem immune to the slow, forward march of aging. All we can do is admire their mindboggling youthfulness from afar.
Here are 40 famous people whose looks have barely changed in the past two decades.
Caroline Praderio contributed to an earlier version of this article.
Rihanna was a teenager when her first single came out, and she looks like she hasn’t aged a day.
At 17, Rihanna released her first album, “Music of the Sun,” and it sold 2 million copies. Since then, the musician has released several chart-toppers like “Umbrella,” “Take a Bow,” “Disturbia,” and “We Found Love.”
Adam Levine is 40 years old, but he certainly doesn't look like it.
Adam Levine's band, Maroon 5, came out with their first album in 2002. It wasn't until 2004 that the musician and his band became popular for songs like "She Will Be Loved." He's now one of the judges on "The Voice."
It's been 15 years since Kanye West released his first album, and he still looks the same.
In 2004, Kanye West released his first album, "The College Dropout." Fifteen years later, he released his latest album, "Jesus is King." He's now 42.
In 2000, Beyoncé was 19 and in Destiny's Child. Today, she's 38 and still looking great.
Twenty years after Destiny's Child, Beyoncé is a Grammy-winning solo musician and a mother of three children - Blue, Sir, and Rumi.
Beyoncé's husband, Jay Z, also does not seem to age.
In 2000, the rapper was 31, and now he is 50 years old.
Twenty years ago, 17-year-old Mila Kunis was on "That '70s Show."
The actress is now 36 years old and is married to her fellow "That '70s Show" actor, Ashton Kutcher.
In 2000, Usher was 22, and he still looks like he's in his 20s.
Today, Usher is 41, and he's still producing music.
At the start of the millennium, Will Smith was 21. In 2002, he was nominated for an Oscar after playing Muhammad Ali in a biopic.
Today, the young-looking actor is still appearing in big Hollywood movies. Most recently, he played Genie in the live-action remake of "Aladdin."
Joseph Gordon-Levitt is almost 40 years old, but he doesn't look a day over 25.
In 2000, the actor was 19 years old and appearing in movies like "Picking Up the Pieces" and "Forever Lulu." Today, he is 38 years old.
Although Jamie Foxx is middle-aged, he still looks as young as he did in 2000.
In 2000, the actor was 33 years old and acting in his own series, "The Jamie Foxx Show." Today, he's 51 and still a popular actor.
Paul Rudd, now 50, is famous for his youthful looks.
He's looked the same since his "Clueless" days.
Jennifer Lopez is 50 but looks like she's barely aged in the past 19 years.
It's practically unbelievable how little J. Lo has aged in the past two decades, and that she's turned the big 5-0.
Add a beard, and John Legend, 40, would essentially look like he did 13 years ago.
John Legend's 40th birthday party was a rager, according to the photos.
Actress Halle Berry is turning 53 this year.
You can learn about how she stays in shape here.
Jared Leto doesn't look a day over 25. He's actually 47.
Here's how he transformed from art-school dropout into superhero movie star.
Mario Lopez is 46 but looks just as young as he did on "Saved by the Bell."
He's still close with the Zack to his A.C., Mark-Paul Gosselaar.
Sandra Bullock definitely doesn't look 55.
She starred in one of the most talked-about movies of 2018, "Bird Box."
Singer Pharrell Williams, 46, is another celeb who never ages.
He doesn't look like he's aged a day.
How could Eva Mendes look the same in two photos taken 16 years apart?
Her husband, Ryan Gosling, is similarly ageless.
Aside from the salt-and-pepper beard, Idris Elba, 47, is unchanged.
Idris Elba performed at Coachella this year as a DJ.
William Shatner almost looks younger now than he did in the early 2000s. He's currently 88 years old.
The octogenarian is currently embarking on a nine-city tour.
Gabrielle Union is radiant at age 47.
Gabrielle Union welcomed her first child with her husband, NBA star Dwyane Wade, in 2018.
Gwen Stefani was just 22 when her band No Doubt got a record deal. She's still performing today at age 50.
Gwen Stefani is dating former Sexiest Man Alive Blake Shelton.
Jennifer Aniston, 50, might look even younger today than she did while starring on "Friends."
Jennifer Aniston is worth a reported $240 million.
It's hard to believe that Elijah Wood is 38 years old.
He'll always be Frodo to us.
Wood's "Lord of the Rings" castmate, Liv Tyler, has also barely aged. She's now 42.
She also looks just like her dad, Aerosmith front man Steven Tyler.
Tyra Banks, now 46, looked the same over two decades ago.
When Tyra Banks reprised her 2000 "Life-Size" role in the 2018 sequel, it was like no time had passed.
Reese Witherspoon, 43, could still pass as her old character Elle Woods.
In fact, she's reprising her role as Elle in the upcoming "Legally Blonde" sequel.
Christy Turlington rose to prominence as a supermodel in the 1980s. Today, she's 50 years old.
Christy Turlington was a member of what was known as the modeling "Big Five," along with Cindy Crawford, Naomi Campbell, Linda Evangelista, and Claudia Schiffer.
Rob Lowe, 55, has updated his hair color — but not much else has changed.
He's been sharing shirtless selfies on Instagram - much to his son's horror.
People love to lambast Gwyneth Paltrow's famously strict diet. Then again, maybe it's the secret to the 47-year-old's youthful glow.
Here are seven terrible health tips from Gwyneth Paltrow herself.
It seems impossible, but "Full House" heartthrob John Stamos is 56 years old.
Most recently, he appeared in the live-action version of "The Little Mermaid" as Chef Louis.
Lisa Bonet is 52, but looks essentially the same as she did 16 years ago.
Her daughter Zoë Kravitz also happens to look exactly like her.
Actor Taye Diggs made the leap from stage to screen but never seemed to age in the process. He's currently 48 years old.
Taye Diggs hosted the Critics Choice Awards in 2019 and even covered the queen herself, Cardi B.
Busy Philipps, 40, has barely changed since her "Freaks and Geeks" days.
She was just 20 years old when she appeared in the cult classic.
Owen Wilson, 51, never lost his boyish looks.
He never lost his love for hats, either.
Kate Winslet looks beautiful at 44.
It's been over 20 years since "Titanic," but we'll still never let go.
If not for those few white beard hairs, it'd be tough to guess that Keanu Reeves is 55.
In fact, there's a conspiracy theory that states Keanu Reeves is an immortal time traveler.
And Dame Helen Mirren is still effortlessly glamorous at 74.
Here are 15 other reasons why she's an absolute boss.
Ricky Martin, 47, must be sipping from the fountain of youth.
The only difference is the mustache.