▲Hollywood's former wonder couple were in a relationship for 12 years, and were married for two.

▲In 2009, Angelina Jolie told German magazine Das Neue that fidelity wasn't absolutely essential for a stable relationship, according to the Daily Mail.

▲The artists have been married for 25 years and have three children.

▲However, they maintain an open-relationship based on trust. According to the Huffington Post, Jada said both she and her husband can do what they want because they trust each other, which Will also agrees with.

▲When he was still married to Uma Thurman, actor Ethan Hawke had a secret affair with Ryan Hawke, who he then married years later.

▲Even though they've been married since 2008 and have two daughters, Ethan Hawke told MR Porter that monogamy is a childish idea and that sexual faithfulness cannot be the basis of a relationship.

▲The couple even split up in 2015, but they rekindled their romance after the arrival of their third child. Brian said the secret to their relationship is absolute trust, according to the Huffington Post. In 2021, they called it quits.

▲The British actor told Entertainment Tonight that he doesn't believe humans should be monogamous.

▲Even though he's been with Anna Eberstein for years, they've never tied the knot. At the age of 62, he has four children by two different women.

▲The 2010 Best Supporting Actress Oscar winner has publicly said she is on an open relationship with fellow actor, Sidney Hicks, according to Us Weekly.

▲The actress revealed she never slept with someone other than her husband after the wedding, but that it was her choice not to.

▲The pair have been together since 2006.

▲The actress has been married twice, but according to Women’s Health, she told Playboy magazine that monogamy is not the key to a successful relationship.

▲During an interview with The Real, the comedian explained she got together with her husband because they both shared the same belief that it's not possible to be sexually faithful to one person only for your entire life.

▲Cho and actor Al Ridenour were married between 2003 and 2015.

▲For 11 years, actress Gwyneth Paltrow and the Coldplay lead singer Chris Martin made up one of the most emblematic celebrity couples in Hollywood.

▲According to People, the two maintained an open relationship because they believed extramarital flings are part of life.

▲Before they got married, the two stars had a laid back relationship. Justin allegedly told Jessica that he wasn't interested in a serious commitment and that their relationship had to be open in order to work.

▲According to ABC News, Biel said that their relationship works because they're both quite selfish and share the same values.

▲The teenage power couple met on the set of 'High School Musical' and were together for five years.

▲But according to Teen Vogue, the actress was jealous of Zac Efron's lifestyle, and that's why things didn't work out in the end.

▲Emma Thompson told the Daily Mail that humans are tied to certain ideals such as 'happily ever after,' but that there are other relationship models that work.

▲Yet she's been in a happy relationship with Greg Wise for 20 years!

▲The award-winning actress shares the opinion that sometimes people can't get what they need from a monogamous relationship.

▲According to the New York Post, she said it's better to go after what you're looking for than living constantly frustrated in a relationship.

▲The country star says that infidelity is only bad if it's exposed and that she'd rather not know if her husband cheated on her.

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According to the Daily Mail, she's been in an open relationship with her husband ever since they married in 1966.

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Nick Cannon has drawn a lot of attention in recent times as he began to welcome multiple children with different women every year. He opened up on 'The Breakfast Club' radio program on August 9 2021 about his disillusionment with monogamy.

"That's an Eurocentric concept when you think about the ideas of, like, you’re supposed to have this one person for the rest of your life," he argued, reports ET. "The idea that a man should have one woman. We shouldn't have anything. I have no ownership over this person. If we're really talking about how we coexist and how we populate, it's about what exchange we can create together."

Cannon added, "I understand the institution of marriage, but if we go back to what that's about, that was to classify property. One father gave another man his daughter for land. I don't want ownership over anybody." He also emphasized that the mothers of his children agree with the arrangement, explaining that it's actually their decision to have children with him. "Every woman that I deal with or dealt with, my life is on front street, they know how I feel. I'm not going around, [thinking,] 'Who am I going to impregnate next?'"

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Scarlett Johansson was married to Ryan Reynolds from 2008 to 2011 and to Romain Dauriac from 2014 to 2017. She is currently married to Colin Jost, whom she wed in October 2020. They have one child together, born in August 2021.

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This couple's relationship followed a strange rule: only Megan Fox could get involved with other people.

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Ever since the beginning of their relationship, the singer and the motocross racer have kept it open. During an interview with The Guardian, Pink admitted she's even been almost a year without sleeping with her husband.

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Many famous celebs don't believe that monogamy is the key to a successful and lasting relationship. Some used to be in open relationships, others got married to their current partners because they both shared the same views.

Click here to see the celebrity couples who are in open relationships!