1. Liam Hemsworth shared a photo of when he and Miley Cyrus first fell in love — on the set of their 2010 film, The Last Song.
2. Rashida Jones posted the ULTIMATE ’90s photo, which featured herself (right) alongside Gwen Stefani, her sister Kidada, and Aaliyah, all decked out head-to-toe in Tommy Hilfiger!
3. Hilary Duff shared her adorably awkward Glamour Shot.
4. Mindy Kaling posted an awesome pic of all the writers of The Office.
5. Reese Witherspoon was in a back-to-school mood when she shared this cute photo of herself on the first day of school.
6. Oprah Winfrey celebrated the 30th anniversary of her former talk show by posting this pic from the very first episode.
7. Enrique Iglesias took us back to 1995 when his debut album dropped.
8. Nicole Richie posted this too cute photo of herself being carried by her dad, Lionel Richie.
9. Sarah Michelle Gellar reminded us that she and hubby Freddie Prinze Jr. are RELATIONSHIP GOALS with her photo of the two of them at the 2000 MTV Movie Awards.
10. Kourtney Kardashian remembered when she had blonde ambitions in the late '90s.
11. Chelsea Clinton celebrated her dad's 70th birthday with a very sweet photo of both of them in the early '80s.
12. Ellen DeGeneres took it back to her very first show in 2003.
13. Jenna Dewan celebrated the 10th anniversary of Step Up by sharing this photo of her and husband Channing Tatum on set.
14. Elton John shared a photo of himself with fellow icons Diana Ross and Cher.
15. Alyssa Milano remembered when she co-starred with Arnold Schwarzenegger in 1985’s Commando.
16. Blake Lively posted this epically early ’90s photo of herself in a Little Mermaid-themed photo complete with sideways ponytail.
17. Ben Affleck remembered the time BFF Matt Damon gave him a birthday cake facial in the late ’90s.
18. Parker Posey shared a photo of herself and her co-star, Joey Lauren Adams, hanging out on the set of Dazed and Confused in 1993.
19. Paul McCartney shared a behind-the-scenes pic from the photo shoot for the iconic cover of the Beatles' Abbey Road album.
20. Amanda Seyfried posted her very first early '00s headshot.
21. Kirsten Dunst shared a photo of her and co-star Brad Pitt promoting their 1994 film, Interview with the Vampire.
22. Beyoncé paid tribute to the late, great Aaliyah.
23. John Krasinski remembered a CLASSIC Jim Halpert prank.
24. Gillian Anderson had a little fun and posted a photo of her X-Files co-star, David Duchovny, shirtless and looking very early ’90s-ish.
25. Michelle Trachtenberg posted a photo from her childhood modeling days.
26. Amy Schumer shared a photo of her and younger sister Kim posing in front of a Dirty Dancing poster in the late '80s.
27. Madonna posted a photo of herself in the early '80s, when she was still a struggling artist living in New York's Lower East Side.
28. Ryan Reynolds (left) remembered when he visited Knott's Berry Farm in 1980.
29. Barbra Streisand looked back at her classic romantic hit film, The Way We Were.
30. Christina Aguilera shared a photo from the Back to Basics era.
31. Halle Berry posted this super cute elementary school photo of herself.
32. James Franco remembered when he portrayed James Dean in the 2001 TV movie, James Dean.
33. James Marsden shared a photo of when he met Beyoncé in the early '00s.
34. Justin Theroux shared a photo of himself with his good friend Amy Sedaris.
35. Kellan Lutz (left) posted an epically late-'80s pic of himself with his older brother celebrating Easter.
36. Lenny Kravitz shared the most rock 'n' roll photo ever: Hanging out with Slash on the set of Guns N' Roses' "Always On The Run" video shoot in 1991.
37. Chris Hemsworth (in the middle) shared a pic of himself, his dad, and his older brother, Luke Hemsworth, going out for a swim in the mid '80s.
38. Lupita Nyong'o shared a photo of when she portrayed Cinderella in a high school theater production.
39. David Beckham posted a photo of his wedding day with wife Victoria.
40. Kim Kardashian (left) honored her sister Kourtney's birthday by sharing a very cute photo of themselves wearing matching outfits.
41. Drake took us back to his days as Jimmy on Degrassi.
42. Salma Hayek gave us a glimpse back to the '90s with this still from her 1997 film, Fools Rush In.
43. Naomi Campbell shared a classic '90s photo of herself with fellow supermodels Stephanie Seymour, Cindy Crawford, Tatjana Patitz, and Christy Turlington.
44. Aziz Ansari shared a very cute photo of himself taken at a Sears Photo Studio (very '80s, of course).
45. Drew Barrymore was feeling so, so '80s with this photo featuring herself, Rashida Jones, Quincy Jones, Kidada Jones, and E.T.
46. Pee-wee Herman shared this fun photo of himself miniature golfing with fellow '80s icon, Cyndi Lauper.
47. Hugh Jackman reminded everyone that he once played Gaston in the Australian production of Beauty and the Beast in 1995.
48. Mandy Moore brought on the waterworks with this photo from A Walk To Remember.
49. And finally, Britney Spears took us back to the early '00s with this photo of herself just chilling with Leonardo DiCaprio.
