Team-work is key in any kind of activity, especially show-business. There are a lot of iconic celebrity duos, and many of them enjoyed working together so much they would gladly do it again. In fact, some have practically become a package deal, and it's difficult to think of one without the other.

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On the other end of the spectrum, there are times when duos don't work out. That can be because of the chemistry between the celebrities, and it normally doesn't end badly. Unfortunately, it happens sometimes that they end up hating each other, but it's still fun to learn about how the duo developed.

10 Love Working Together: Matt Damon & Ben Affleck

Everybody loves this bromance. It's no surprise that these two talented actors have such a good rapport on screen, given how much they know and love each other. One of the reasons behind their great creative chemistry is perhaps the fact that they grew up together and have been best friends from a very early age.

Sharing the same passion for acting probably brought them even close together as they got older, and having the opportunity to share so many amazing projects strengthened their bond. They appeared in nine movies together, including Chasing Amy, Dogma, the Jay and Silent Bob, and Good Will Hunting, which they wrote together.

9 Refuse To Work Together: Jennifer Lopez & Sean Combs

As it is well-known, the two artists have had a romantic past, but it was almost two decades ago. However, in 2013, they had the opportunity to reunite, as they had both been offered to be judges in American Idol.

Although their relationship had ended a long time ago, neither of them felt comfortable with the situation, and one of them had to decline the opportunity. As most people know, JLo ended up staying in the show. It made sense, since Jennifer had already been a part of the reality show before, so it was kind of her territory.

8 Love Working Together: Tom Hanks & Meg Ryan

These two actors have worked together in many movies, such as Sleepless In Seattle, You've Got Mail, and so on. The pair have undeniable chemistry, and love working together.

Not too long ago, Meg Ryan talked about why she loved working with Tom Hanks so much, and this is what she had to say: "He's just so easy. He listens; he roots for other people. He doesn't like there to be drama. I feel the same way. We're just really there to have fun, this is supposed to be a creative experience and there's no reason to get heavy."

7 Refuse To Work Together: Bruce Willis & Kevin Smith

This partnership did not end well, and readers shouldn't expect these two to work together any time soon, even if they've somewhat worked out things by now. The saddest thing about this is that the two actors had a good relationship when they started working together in 2007 in Live Free or Die Hard.

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However, working in Cop-Out in 2010 strained their relationship. At the time, Kevin Smith defined working with Bruce Willis as "soul crushing." The tension between the two of them never really went away, and in 2018 Kevin tweeted about not being invited to Bruce's Comedy Central Roast.

6 Love Working Together: Scarlett Johansson & Chris Evans

Most fans know that Scarlett Johansson worked with Chris Evans in the Avengers movies, but they'd actually worked together before. In 2004, they starred in the movie The Perfect Score, and they reunited in 2007 to work in The Nanny Diaries.

The chemistry between them is hypnotic, and Scarlett said that "it’s really a result of 10 years of knowing somebody and being able to have a kind of intimacy with them that I think you get from just spending a lot of time with somebody and knowing their soft underbelly." She was talking about an emotional scene from 2014’s Captain America: Winter Soldier between Black Widow and Captain America.

5 Refuse To Work Together: Julia Roberts & Nick Nolte

Ever since they made the mistake of co-starring a movie, Julia Roberts and Nick Nolte have erased any possibility of ever working together again, and have not been shy about it. Apparently, in 1994, during the making of I Love Trouble, they just couldn't stand being in the same room with each other. Once the movie was released, the two of them shared their experience of how horrible working together had been.

Julia even said that while Nick could be "charming and nice, he’s also completely disgusting." Nick responded saying: "It’s not nice to call someone ‘disgusting.’ But she’s not a nice person. Everyone knows that."

4 Love Working Together: Bradley Cooper & Jennifer Lawrence

Bradley Cooper and Jennifer Lawrence have worked together in many movies and couldn't be happier about their team-work. Despite the age difference, the two of them have always gotten along wonderfully ever since they met while working on Silver Linings Playbook. Bradley said it might have something to do with having had to dance together in their first movie.

"I really do think that really provided the basis by which we can just work together. We don’t talk often, but when I showed up in Boston for Joy, then all of a sudden it was like we never stopped. We just started where we left off, and that’s rare. It’s just easy to look at her and feel like I’m telling the truth," he said.

3 Refuse To Work Together: Jennifer Aniston & Leslie Mann

Jennifer Aniston is one of the most successful actresses of her generation, and whatever her problem with Leslie Mann is, people respect her decision to not work with her.

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The two of them appeared in the movie She's The One, and apparently didn't get along. According to an inside source who talked to RadarOnline, "Jen longs to star in a comedy with her friend Elizabeth Banks, but a major stumbling block is that Judd (Apatow) might want Leslie to be in the movie, too," said the source, and added that "Leslie is probably the biggest obstacle to Judd doing a film starring Jen or Elizabeth."

2 Love Working Together: Helena Bonham-Carter & Johnny Depp

Although this is an acting duo, it should be considered a trio, the third party being director Tim Burton. Helena and Tim were together for over a decade and have two kids, and although they split up in 2014, they stayed friends and Helena kept working on his movies. Johnny Depp is the godfather of both kids and a constant in most of Tim's work.

His chemistry with Helena is really one of a kind. "(Working with) Johnny is very easy, very professional and I really love it. It’s also really funny because you never really know what he’s going to do next," said Helena about working with him.

1 Refuse To Work Together: Sylvester Stallone & Richard Gere

It's been years since these two iconic movie stars decided they couldn't stand each other, and true to their word, they never worked together again. In 1974, the two of them were cast in main roles in The Lords of Flatbush.

From the beginning, they didn't see eye to eye, and after a fight regarding a problem with Gere's lunch, Richard Gere was fired, and to this day they don't get along. A lot of rumors about them came up through the years, but none of them gave them much thought.

NEXT: The Kissing Booth's Joey King & 9 Other Stars Who Had To Work With An Ex