1. Full House
Bob Saget, John Stamos, and Dave Coulier did the ultimate '90s throwback by reprising their iconic Full House characters -- Danny Tanner, Jesse Katsopolis, and Joey Gladstone -- in a hilarious skit on The Tonight Show.
2. Maid in Manhattan
Twelve years after the release of their film, Maid in Manhattan, Jennifer Lopez and her on-screen son Tyler Posey had an onstage reunion at the Teen Choice Awards. And, by the looks of it, she met his grown-up abs for the first time.
Leave it to Jimmy Kimmel to actually (well almost) reunite the cast of Friends. Twenty years after the premiere of the show -- and 10 years after the finale – Jennifer Aniston, Lisa Kudrow, and Courteney Cox reunited in a skit where they read aloud some Friends fan-fic.
4. The Wonder Years
The entire show's cast (L-R: Alley Mills, Josh Saviano, Olivia d'Abo, Jason Hervey, Fred Savage, Dan Lauria, and Danica McKellar) reunited to celebrate the DVD release of the series.
5. Boy Meets World
Most of the original cast has been doing cameos on the Boy Meet World spin-off, Girl Meets World, but the show's Christmas episdoe was the first time that almost the entire cast reunited at once (L-R: William Russ as Alan, Betsy Randle as Amy, and a Rider Strong as Shawn).
6. Married With Children
Christina Applegate, Ed O'Neill, and David Faustino reunited in celebration of their Married With Children co-star, Katey Sagal, receiving a star on the Hollywood Walk of Fame.
7. Hey Dude
The cast reunited for the first time in almost 25 years, at the ATX Television Festival in Austin. The cast members -- clockwise from top left: Jonathan Galkin (Jake), Geoffrey Coy (Kyle), Josh Tygiel (Buddy), David Brisbin (Mr. Ernst), David Lascher (Ted), Christine Taylor (Melody), and Debrah Kalman (Lucy) -- spoke to BuzzFeed and spilled some behind-the-scenes secrets about the series.
8. One Tree Hill
One Tree Hill co-stars Sophia Bush (Brooke), Bethany Joy Lenz (Haley) and Hilarie Burton (Peyton) reunited a OTH convention in Paris.
The trio were also joined by their fellow OTH co-stars Paul Johansson (Dan) and Jaes Lafferty (Nathan)."
9. Thelma & Louise
Thelma & Louise co-stars, Susan Sarandon and Geena Davis gave us another epic selfie.
Lost stars (L-R) Noreen O'Toole (the show's associate producer), Malcolm David Kelley (Walt), Jorge Garcia (Hurley), Ian Somerhalder (Boone), Josh Holloway (Sawyer), Samantha Thomas (the show's co-producer), Yunjin Kim (Sun), and Henry Ian Cusick (Desmond) reunited at Paleyfest for the 10th anniversary of the series.
11. Dawson's Creek
Eleven years after the Dawson's Creek finale, co-stars James Van Der Beek and Joshua Jackson had an unexpected reunion in Los Angeles.
12. Napoleon Dynamite
Haylie Duff (Summer), Jon Heder (Napoleon), Tina Majorino (Deb), and Efren Ramirez (Pedro) reunited for Entertainment Weekly's "Reunions Issue."
13. Forrest Gump
Tom Hanks hung out with his Forrest Gump co-stars Mykelti Williamson (Bubba) and Gary Sinise (Lieutenant Dan).
14. 10 Things I Hate About You
10 Things I Hate About You co-stars Andrew Keegan (Joey), David Krumholtz (Michael), Susan May Pratt (Mandella), and Joseph Gordon-Levitt (Cameron), along with the film's writers Karen McCullah and Kirsten Smith, held a mini-reunion in honor of the film's 15th anniversary.
15. Buffy the Vampire Slayer
Sarah Michelle Gellar, Michelle Trachtenberg, and Seth Green had a mini-Buffy reunion at a screening for Annie, of all places.
16. Buffy the Vampire Slayer (again)
Sarah Michelle Gellar also had a reunion with Angel himself, David Boreanaz, on the set of his show Bones.
17. Laguna Beach
Ten years after the premiere of Laguna Beach, cast members Dieter Schmitz (second from left), Stephen Colletti (second from right), and Trey Phillips (right) reunited at the wedding of a high school friend.
18. The Sisterhood of the Traveling Pants
(F-B) Amber Tamblyn, America Ferrera, Alexis Bledel, and Blake Lively had a Sisterhood of the Traveling Pants reunion over the best thing ever: BRUNCH!
19. Mean Girls
The most fetch reunion of the year! Lacey Chabert, Rachel McAdams, Amanda Seyfried, Lindsay Lohan, and the film's screenwriter, Tina Fey, reunited for Entertainment Weekly's "Reunions Issue."
20. The Little Rascals
Twenty years after the movie's premiere, the entire cast of The Little Rascals not only reunited, they also re-created the film's iconic poster, and in the process made all of us feel old. =(