1. Emma Watson
Emma's first red carpet was, of course, at the world premiere of Harry Potter and the Philosopher's Stone in 2001.
He started acting in 2002, so he could have of course attended earlier red carpets. But the first one we found with his name listed was at the Gold Nymph Awards in July 2004. Just LOOK at him.
Kristen was just 11 years old when she walked the red carpet at the Panic Room premiere back in 2002. She has previously spoken about her outfit that day, telling Marie Claire last year: "I did not know how to get dressed up at that age at all, I didn’t even know what I liked. I was just like completely… a goofy kid. But it’s just funny to see like that goofy kid version." Awww.
4. Tom Hardy
Tom had a lot less facial hair at the premiere of Star Trek Nemesis back in 2002 compared with how we know him in 2015.
5. Beyoncé
The original line-up of Destiny's Child released their first album in 1998. Here they are at a party that same year – when Beyoncé was just 16 years old.
6. Aaron Paul
Aaron started attending red carpet events around 2001, usually on the arm of then-girlfriend Samaire Armstrong. We found this classic picture from the 2001 Los Angeles premiere of K-PAX. Such amazing style.
7. Daniel Radcliffe
He looked so excited and adorable at the Harry Potter and the Philosopher's Stone premiere in 2001. Now he's all grown up and full of facial hair.
8. Britney Spears
Bless the cutesy Britney Spears of 1998. Here she is at the '98 American Music Awards shortly before her debut album ...Baby One More Time was released.
9. Robert Pattinson
In 2005 Robert Pattinson arrived at the World Premiere of Harry Potter and the Goblet of Fire looking immaculate in leather trousers and a red velour jacket. And we simply love him for it.
10. Kirsten Dunst
What an absolute cutie! Here she is at the Interview With a Vampire premiere in 1994. Twenty years later and she's still a babe.
11. Blake Lively
She's our one true fashion queen nowadays but back in 2005 she happily turned up to a red carpet event in ripped jeans <3 Here she is at the 18th Annual Kids Choice Awards that year rocking her '00s fashion.
12. Calvin Harris
His first album was released in 2007, so there's every chance he appeared at a red carpet event before this one. But no other picture could be better. Here's Calvin at the 2009 Brit Awards, way before life as Taylor Swift's hunky boyfriend.
13. Keira Knightley
We love '00s Keira. Here she is at the Bend It Like Beckham premiere in London in 2002 compared with her at this year's Oscars. 💅
14. Kerry Washington
We think you'll agree she still looked absolutely fly at the Save the Last Dance premiere in 2001.
15. Drew Barrymore
!!! As we know Drew Barrymore made her big break at the tender age of seven when she 7 in E.T. the Extra-Terrestrial. And here she is in 1982 looking like an absolute princess at the premiere.
16. Taylor Swift
In 2006 Taylor Swift was just making her mark at the CMT Music Awards. Fast-forward to the 2015 Billboard Music Awards and she has the world at her feet.
17. Leonardo DiCaprio
Leo was in plenty of movies before Romeo + Juliet and Titanic. One of his first movie roles was in 1993's This Boy's Life. Here he is at the premiere alongside Tim Roth and a cheeky Bridget Fonda.
18. Matthew Lewis
He appeared as Neville Longbottom in all eight of the Harry Potter movies, but we first saw him on the red carpet at the Harry Potter and the Prisoner of Azkaban premiere in 2004.
19. Justin Bieber
Bieber released his first single, "One Time," in 2009. Ahead of the release he appeared at Nickelodeon's 2009 Kids' Choice Awards alongside one of his mentors, Usher, looking very different from how he poses at showbiz events today.
20. Miley Cyrus
Before there were wrecking balls and twerking, Miley used to turn up to events with her father — like at this studio event in 2006.
21. Emma Stone
Yet another one of our modern-day style queens. Back in 2006, when Emma attended a Replay launch party, she was just as cute.
22. Jennifer Lawrence
On the left: Jennifer all fresh-faced at the Annual Movieguide Faith and Values Awards in 2007. On the right: Jennifer at the 2015 Met Gala.
23. Angelina Jolie
Back in 1986 Angelina accompanied her father, actor Jon Voight, to the Governor's Ball, and now she's perfected her look even more.
24. Ariana Grande
Before she had her trademark slick, high ponytail, Ariana showed off her curls at an event in 2008.
25. Rihanna
A lot can change in 10 years. Needless to say Rihanna has come out of her shell and got ~slightly~ more extravagant compared with her debut at a Key Club event in 2005.
26. Mindy Kaling
She's hardly changed since The 40-Year-Old Virgin's premiere in 2005 — although we can't quite imagine her showing up to another premiere in jeans now.
27. Anna Kendrick
Don't you just want to give her a big cuddle? Before finding superstardom, Anna went to her first red carpet at the Tony Awards in 1998.
28. The Kardashians/Jenners
Here's what the Kardashian and Jenner clan looked like in 1995. It's been a while since they were all on a red carpet together, but the photo on the right is from when they were a little more grown-up in 2011.
29. Mary-Kate and Ashley Olsen
How amazing did these two look?! It wasn't strictly a red carpet, but here the twins are on their 1991 ABC Fall TCA Press Tour. Literal heart-eye emoji.
30. Josh Hutcherson
Here's young Josh at the Hansel & Gretel premiere in 2002.
31. Lindsay Lohan
When life was simple! Lindsay Lohan first attended The Parent Trap premiere in 1998.