When it comes to dating, there's an endless list of unwritten rules.
Although Dua Lipa had just three, the extent to which we actually follow them, however, varies greatly.
But, actor Margot Robbie, who is now married to producer Tom Ackerley, had one strict rule that she refused to stray from when she was single.
As with any person in the spotlight, people are gonna speculate about your personal life.
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And Robbie was certainly no exception.
She'd been previously linked to various to her co-stars, Leonardo DiCaprio and Alexander Skarsgård, who she starred opposite against in The Wolf of Wall Street and The Legend of Tarzan.
But these were all just rumours.
However, in 2015 interview with Marie Claire, the Babylon star said that people 'take such an interest in your love life' when you are famous, which influenced her dating rule.
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She said: “I made a conscious decision not to date actors, but not because I hate actors. That’s a nasty generalisation to make, and that’s not the case.
"People take such an interest in your love life when you have a profile that it puts a lot of stress on a relationship. So, two people with profiles, I figure it’s just double the amount of scrutiny, and I’d like to avoid that at all costs."
Robbie then added that she was 'officially off the market' anyway.
And, over the years, the actor has mostly managed to keep her private life, well private.
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In 2016, she quietly tied the knot to Ackerley, who has produced films such as I, Tonya and Promising Young Woman.
The pair were actually housemates together in London in 2014, and Robbie told the Guardian in 2018 that they'd tried to keep their relationship a 'secret' because they weren't 'taking it very seriously' at the time.
Later, in 2016, she told Vogue that their romance actually came as a bit of a surprise to her.
"I was the ultimate single gal," she said. "The idea of relationships made me want to vomit. And then this crept up on me.
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"We were friends for so long. I was always in love with him, but I thought, 'Oh, he would never love me back. Don't make it weird, Margot. Don't be stupid and tell him that you like him.'
"And then it happened, and I was like, 'Of course, we're together. This makes so much sense, the way nothing has ever made sense before."
Featured Image Credit: Gregory Pace/REX/Shutterstock / Red Granite PicturesTopics: Celebrity, TV and Film, Sex and Relationships, Margot Robbie