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11 Actor Duos Whose Friendships Fill Me With Joy, And 10 Whose Feuds Are Frankly A Tragedy

"If you don't marry her, I will."

Let's be honest: Work-related feuds are common, and they can get real spicy when you have to pretend to like someone for a living.

On the other hand, when you strike up a friendship with someone at work, it can sometimes lead to the tightest of bonds!

Here are 11 pairs of actors who became best buddies after meeting in this business we call show, and 10 sets who completely fell out after working together.

1. Let's start off friendly, with great chums Paul Rudd and Jennifer Aniston!

Paul Rudd and Jennifer Aniston as George and Linda Gergenblatt hugging each other in Wanderlust

2. On a more sour note, Dwayne "The Rock" Johnson and Vin Diesel are apparently NOT the biggest fans of each other.

Dwayne Johnson as Hobbs and Vin Diesel as Toretto square up to each other in Fast Five

3. Back to pals — Jennifer Lawrence and Emma Stone are true BFFs!

Jennifer smiling and standing behind a smiling Emma on the red carpet

4. It seems Magic Mike actor Channing Tatum wasn't a fan of his costar Alex Pettyfer.

Channing Tatum as Mike and Alex Pettyfer as Adam topless in Magic Mike

5. Channing didn't have the same problem with Jonah Hill, though — they became best buds!

Channing Tatum as Jenko and Jonah Hill as Schmidt in 21 Jump Street

6. However, there was next to no love between The Fresh Prince of Bel-Air stars Will Smith and Janet Hubert.

Will Smith and Janet Hubert as Aunt Viv glaring at each other in "The Fresh Prince of Bel-Air"

7. Tobey Maguire and Leonardo DiCaprio have been friends for decades.

Tobey and Leo looking at a sports team play

8. On the other hand, Tommy Lee Jones did NOT have a good time working with Jim Carrey.

9. One of the most wholesome celebrity friendships EVER is Patrick Stewart and Ian McKellen's.

Ian and Patrick kissing

10. Sometimes romantic relationships can create feuds, as in the case of Jerome Flynn and Lena Headey.

Jerome Flynn as Bronn and Lena Headey as Cersei in "Game of Thrones"

11. Michael Fassbender and James McAvoy have a beautiful bromance going on.

Michael and James sitting and smiling together on a talk show

12. However, Sylvester Stallone and Richard Gere almost had a 'fistfight' over Princess Diana...and a gerbil.

13. Chris Hemsworth and Tom Hiddleston are "brothers from another mother" onscreen and off.

14. Freddie Prinze Jr. couldn't stand working with Kiefer Sutherland.

Freddie Prinze Jr. as Cole Ortiz and Kiefer Sutherland as Jack Bauer in "24"

15. Sandra Bullock and George Clooney have been chums for over three decades.

Sandra and George smiling and hugging on the red carpet

16. Bill Murray reportedly was "hurling insults" at Lucy Liu during the filming of Charlie's Angels.

Bill and Lucy looking at each other in a scene from Charlie's Angels

17. Salma Hayek and Penélope Cruz are "like sisters".

Salma and Penélope clasping each other's hands on the red carpet

18. Paul Wesley and Nina Dobrev "despised each other" while filming part of The Vampire Diaries.

Nina Dobrev and Paul Wesley as Elena Gilbert and Stefan Salvatore in "The Vampire Diaries"

19. Donald Faison and Zach Braff have a podcast together and are best bros IRL.

Donald Faison as Turk and Zach Braff as JD looking lovingly at each other in "Scrubs"

20. Ryan Gosling and Rachel McAdams did NOT get on during the filming of The Notebook.

Ryan Gosling as Noah holding Rachel McAdams as Allie in his arms in the rain in "The Notebook"

21. Finally, Matt Damon and Ben Affleck have been friends since they were kids!

Ben Affleck as Chuckie Sullivan and Matt Damon as Will Hunting in Good Will Hunting

Don't forget to add your fave actor friendships and/or feuds in the comments below!