Plenty of films have thrilling set pieces or cool special effects. However, memorable characters really determine whether or not a movie stands the test of time. And, as the old age says, two heads are better than one.

That’s certainly the case for these famous movie pairs. Their complex relationships and unique chemistry ensure that audiences will enjoy their stories for years to come. Want to see who made the cut? Alright then — lights, camera, action!

1. Batman and Robin: There’s no match for the Caped Crusader and his trusty sidekick! With all due respect to Christian Bale and Michael Keaton, Adam West and Burt Ward’s campy 1960s take on the superheroes stands out as the most memorable.

KPBS

2. Doc Brown and Marty McFly: Back to the Future is so fun that nobody thought to question why a teenage boy is best friends with a mad scientist. Christopher Lloyd and Michael J. Fox had such natural chemistry that it didn’t seem to matter!

TIME

3. Bonnie Parker and Clyde Barrow: Even 50 years after the film’s release, these bank robbers remain one of cinema’s most infamous couples. Bonnie and Clyde owes its popularity to both critical acclaim and significant controversy over its taboo subject matters.

Variety

4. Cheech and Chong: After topping the charts with uproarious comedy records, Cheech Marin and Tommy Chong made it to the big screen with 1978’s Up in Smoke. The stoner pals continue to appear in feature films to this very day! Who says marijuana makes you lazy?

5. Woody and Buzz Lightyear: Despite getting off on the wrong foot — maybe they had snakes in their boots — this cowboy and astronaut became best friends. Their Toy Story franchise put Pixar on the map, and both Tom Hanks and Tim Allen consider it among their favorite projects.

6. Chewbacca and Han Solo: The Millennium Falcon is the fastest ship in the galaxy, but it wouldn’t amount to much without its pilots. Since emerging as two of the most popular characters in Star Wars: A New Hope, Han and Chewie also appear in the sequel trilogy, much to fans’ delight.

Inverse

7. Danny Zuko and Sandy Olsson: Opposites do attract! Grease tells the love story between this bad boy and goody-two-shoes, with an insanely catchy song every five minutes. Movie watchers still can’t get enough of John Travolta and Olivia Newton-John flying off into the sky.

8. Cameron Frye and Ferris Bueller: Even if you have played hooky, you’ve never partied as wildly as these two high schoolers. They might not be the actual Sausage Kings of Chicago — that’s Abe Froman — but they were on top of the world on that one day off.

Paramount

9. Thelma Dickinson and Louise Sawyer: Geena Davis and Susan Sarandon became feminist icons in this tale of a girls’ road trip gone awry. The gut-punching ending of Thelma and Louise also made for one of the most memorable movie finales of all time.

10. Vincent Vega and Jules Winnfield: Though John Travolta shared a classic dance with Uma Thurman, his true Pulp Fiction BFF will always be Samuel L. Jackson. The friendship between these well-coiffed hitmen provides the heart of Quentin Tarantino’s masterpiece.

Time Out

11. Frodo Baggins and Samwise Gamgee: If these hobbits didn’t have each other’s backs, they never would have carried the One Ring all the way to Mordor. Additionally, Gollum gets an honorable mention as the best third wheel in film history.

12. Lloyd Christmas and Harry Dunne: Jim Carrey and Jeff Daniels stumbled through all kinds of idiotic adventures in the 1994 hit, Dumb and Dumber. Their hideous blue and orange tuxedos remain a staple of Halloween costume parties everywhere.

13. Agent J and Agent K: If you need to fight alien scum in New York, just give Will Smith and Tommy Lee Jones a call. Even with their memory-erasing neuralyzer, fans can never forget the offbeat charm of the Men in Black movies.

Times Union

14. Jack Dawson and Rose DeWitt Bukater: If you want to feel like you’re flying, just stick your arms out and watch Titanic — at least until the ending. But don’t feel too bad for Jack and Rose, as these roles made Leo DiCaprio and Kate Winslet into A-list movie stars.

15. Butch Cassidy and the Sundance Kid: True, The Sting was a lot of fun. However, this Western epic is easily the more famous of Paul Newman and Robert Redford’s collaborations. Even as they broke the law and went down in a blaze of glory, these outlaws made their mark as true film heroes.

16. Detectives James Carter and Yang Naing Lee: This LAPD cop and Hong Kong detective make for a hilarious pairing in the action-comedy Rush Hour. Full of crazy stunts and outrageous one-liners, Chris Tucker and Jackie Chan returned for two more outings.

Slash Film

17. Molly Jensen and Sam Wheat: There are a lot of romantic movie moments out there, but few measure up to the pottery scene in Ghost. In this 1990 smash, Demi Moore and Patrick Swayze prove that love is eternal, even beyond the grave.

Paramount

18. Kermit the Frog and Miss Piggy: One is a banjo-strumming amphibian, the other is a porcine diva. Together, they make up puppetry’s most notable on-again, off-again couple. Kermit and Piggy have gone back and forth since 1975, so who knows if they’ll ever figure it out?

WTKR

19. Ethan Tremblay and Peter Highman: When Due Date arrived in theaters in 2010, many critics deemed it a Planes, Trains, and Automobiles for the new generation. Zach Galifianakis and Robert Downey Jr. won over audiences as mismatched friends on a disastrous road trip.

Newsweek

20. Mister Spock and Captain James Kirk: Who has boldly gone where no man has gone before? Why, Leonard Nimoy and William Shatner, of course! These Star Trek besties piloted the Enterprise across dozens of TV episodes and six feature films.