Scarlett Johansson and Deadpool actor Ryan Reynolds had one of those celebrity marriages that was so private that it can be difficult to tell what really went on and what didn't.

They started dating in 2007 and were engaged and married in 2008. Johansson was only 23-years-old to Reynolds' 31 years. Everyone (well, almost everyone) assumed they were all loved up and things were just fine.

Well, in 2010 Reynolds made that mistake of a movieGreen Lantern. Maybe the mistake was casting Ryan Reynolds as the superhero. Who knows? And guess who starred alongside him? One Blake Lively. Of course, nothing went on. Sure...

Then at the end of 2010, guess what? Scarlett Johansson and Ryan Reynolds announced "with love and kindness" that they were separating and divorcing. The autopsy on the marriage is one interesting read.

It was not a marriage made in heaven by a long shot. So, let's have a look at what (probably) went on inside the marriage of Black Widow and Deadpool, a.k.a. Scarlett Johansson and Ryan Reynolds.

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Scarlett Was Immature And Angry

ScarJo was a very young 23-year-old when she and Reynolds married. She has said "The first time I got married I was 23-years-old. I didn't really have an understanding of marriage. Maybe I kind of romanticized it." Well, whether reality made her angry or she was just that way already, many report that there was an alarming lack of warmth between Scarlett and Ryan. It was like they were on different planets.

She seemed angry much of the time and she didn't as much talk to Ryan, as yell and scream at him. When he made 2009's The Proposal with Sandra Bullock, many report hearing Scarlett yelling at Ryan in his trailer. She was, they said, "going nuts".

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Two Workaholics With Completely Different Personalities

Ryan Reynolds has admitted to suffering from anxiety much of his life. He can be manipulative and controlling. And that was something that the independent Scarlett Johansson could not tolerate. There were fights. Lots of fights.

Said one source: "He can be an overbearing control freak. He's more traditional and she's more independent." And that caused problems, too. According to one source: "They're both strong-willed and stubborn people." Each wanted everything to go their own way. There was no compromise.

Oh, when they were out and about at Red Carpet events it was all smiles and lovey-dovey. But that was not the reality. The reality was they both dedicated themselves to their individual careers and simply didn't care enough to make time for one another.

Said Scarlett: "We have no time for dates. We work and then go home and — I, anyway — just stare at the wall for a few hours before I go to sleep." It's surprising that they managed to stay married as long as they did. It sounds like a dreary existence.

After months of "will they, won't they" speculation, the couple announced a so-called amicable split in December of 2010. The cover story was that they were just both too busy, spent too much time apart, to make the marriage work.

The Green-Eyed Monster

Reportedly, jealousy played a big part in the marriage, or rather its downfall. Ryan was always wary of Scarlett's many male musician friends. And for her part, Scarlett was "concerned" about what was going on between Ryan and Green Lantern co-star Blake Lively.

Okay, Ryan Reynolds and Blake Lively spent a lot of time together in 2010 making the disaster that was Green Lantern. In the film, they were all loved up. Now, the official story is that they didn't start dating until after Reynolds and Johansson separated. They were "just friends" until 2011 when they became an item. In fact, there is some story about how the two went out on a double date in 2011, not with one another, but with other people. And Blake Lively has come up with a tale about how, even on that double date, there was no chemistry between her and Reynolds.

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Well, there's another, much more interesting, side of the story which reads like this: Reynolds and Lively first hooked up on the Green Lantern set.

Is there any evidence? Well, yes there is. For starters, back before Scarlett and Ryan announced their separation, Blake and Ryan were spotted having a cozy little dinner in a restaurant in New York. A waitress at the restaurant has said "the pair looked more like a couple than just friends".

According to the Daily Mail, she said: "It was just the two of them, and they were laughing and flirting. It looked like a date. If you didn't know who they were, you would definitely assume they were a couple." Interesting, we think.

The questions are: how much did Scarlett know (or suspect) about what might have been going on and was it the real reason for the divorce? We will probably never know for sure.

So that's the scoop on what might be termed Scarlett Johansson and Ryan Reynolds' totally dysfunctional marriage. Other than the fact they didn't get along, had wildly different personalities, were plagued by jealousy, and fought all the time, it was a great marriage. Or not, as the case may be.

NEXT: Deadpool 3: Will It Really Happen?