1. Guess Who?
This little guy is currently starring in a big movie. Guess who?
2. It’s James Franco!
Isn't James kind of making the same facial expression in this modern day pic? James uploaded that baby pic to his ever-popular Instagram account.
3. Guess Who?
This girl is a fan favorite, for sure. She wears her hair in a different style now, but we think she looked awesome then, too!
4. It’s Mila Kunis
All grown up, Mila is dating hottie Ashton Kutcher and starring in 'The Big and Powerful Oz.'
5. Guess Who?
She now has a family of her own and a major hottie by her side.
6. It’s Angelina Jolie!
Yes, that little girl is the woman who had a Twitter account made about her leg AND the woman who is in a steamy relationship with Brad Pitt. We'll admit it, Ange. You totally rocked that dress.
7. Guess Who?
The girl starring in this pastel-filled picture also starred in and shared a reality show.
8. It’s Paris Hilton!
Did you know that the little girl in the pink and purple dress was actually the socialite that made "that's hot" a thing?
9. Guess Who?
This celeb put up a pic on her Instagram with the hashtags #TBT and #Pilates. Side Note: How many of you had that Little Tikes toy?
10. It’s Emma Roberts!
Emma Roberts was that baby working out! She sure has come a long way since 'Unfabulous.' Check out her Instagram
11. Guess Who?
This one is rather easy. He's a Hollywood heartthrob that we all know and really, really love.
12. It’s Leonardo DiCaprio!
The 'Django Unchained' star was just as charming in 'Growing Pains' as he is now.
13. Guess Who?
Who do you think that spiky-haired kid on the right is?
14. It’s Ben Affleck!
It's hard to remember him before the scruff, but that was Ben Affleck in one of his roles in ABC's 'Afternoon Special.'
15. Guess Who?
It's a brother/sister team! Kids usually don't seem so enthusiastic in these posed photos, but these two look super excited.
16. It’s Rob and Khloe Kardashian
All dressed in denim, the brother/sister team is Rob and Khloe Kardashian. Looks like they've been BFF since the very beginning.
17. Guess Who?
The now adult-version of this little girl has her very own wine and is a beauty and movie pro.
18. It’s Drew Barrymore!
Hey, Drew! That wine looks delicious. Drew has been in the business a long time—that picture was black and white!
19. Guess Who?
Who's that cool cat? Well, he's actually married to one of the other babies we posted earlier.
20. It’s Brad Pitt!
Yes, the guy in the yellow cut-off went to the Oscars with Angelina Jolie. It's true. It's ALSO true that he was a hunk back then, too!
21. Guess Who?
We had no clue this star was a Disney fan. Do you know who she is?
22. It’s Christina Applegate!
Hanging out with Jimmy Fallon is definitely different than a get-together with Minnie Mouse, but Christina seems like she is enjoying both.
23. Guess Who?
Who's that girl?
24. It’s Zooey Deschanel!
To finish our hint before...It's Jess!
Yes, it's really Zooey Deschanel sporting a different color hair. We just wanted to finish the song.
25. Guess Who?
What 2013 Oscar Nom starred in a series entitled 'Murder, She Wrote'?
26. It’s Joaquin Phoenix
It's the talented Joaquin Phoenix. Joaquin has been acting since he was just a little kid, starring in shows like 'Murder, She Wrote' and also in ABC's 'Afterschool Specials.'
27. Guess Who?
He's making another debut on SNL soon. We're all pretty much obsessed with him here at this office.
28. It’s Justin Timberlake!
There he is in a suit and a tie—pun intended. For this boy, curly blonde hair and the boy band 'NSYNC came before his marriage to Jessica Biel and a ton of SNL appearances.
29. Guess Who?
The girl on the right is now a fashionista, former reality TV star and beauty whiz.
30. It’s Lauren Conrad!
Lauren posted this picture to her Instagram account with the caption, "Found this photo of me on my first day of kindergarten... 20 years later my feelings about Monday mornings remain the same." We feel the same way about Mondays, Lauren.