Sylvester Stallone's rivalry with Arnold Schwarzenegger, according to him, became 'out of control.'

They were mutually hateful. They adore each other now.

During an interview on The Graham Norton Show this evening, Sylvester Stallone and Arnold Schwarzenegger admitted to that narrative.

Stallone claimed that "even our DNA hated each other" as a result of the two action stars' frequent press sniping.

The late 1990s saw the end of that. Both of them had made investments in the Planet Hollywood restaurant chain, so they ended up going to different openings together. That's what drew them together, and they've been fast friends ever since, frequently working together on projects.

After their friendship on Planet Hollywood, Schwarzenegger and Stallone started a string of buddy films, with Schwarzenegger starring in the Expendables trilogy and Stallone's 2013 action thriller Escape Plan. He is a wonderful person, and we are now inseparable, said Arnold Schwarzenegger.

What sparked the animosity earlier? It all started at the 1977 Golden Globes when they shared a table. Schwarzenegger took home the New Star award, while Stallone was a loser in five of the six categories in which he was nominated.

Schwarzenegger took up the New Star of the Year award, while Stallone's Rocky was nominated in six categories but lost in five of them.

When Rocky eventually won Best Motion Picture – Drama, Stallone would later say that Schwarzenegger had laughed at their losses, which is why he threw a bowl of flowers at his fellow actor.

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The two were always striving to outdo one another in the years that followed. They would trade barbs in interviews, but in their films, they would strive to outdo each other in terms of the quantity of kills and weaponry their characters had.

In 2013, Stallone said to David Letterman, "After a while, I started to like this one-upmanship, this competition." His pistol would be larger. I would take more lives. He would take more lives.

The gravest attack on the action star came from Schwarzenegger's accusation that Stallone employed body doubles in several of his films. Shortly after, as a stand-in for Schwarzenegger, Stallone starred in Rocky IV (1985) against a fictional antagonist who had no distinguishable accent.

Following his role alongside Danny DeVito in the 1988 comedy Twins, wherein DeVito's character makes fun of a poster picturing Stallone as Rambo, Stallone also made the decision to venture outside of his action genre and attempt humor. Unfortunately for him, however, Stallone accidentally picked the 1991 failure, Oscar!.

1992 saw Stallone play the lead in the comedy misfire Stop! Or My Mom Will Shoot. He attributed this one entirely to Schwarzenegger, who acknowledged as much in a Jimmy Kimmel interview.

"The script was a piece of s***, after reading it. Let's be truthful," he said. "I promise myself that I will not work on this film. Once they arrived at Sly, I received a call from Sly asking, "Have they ever talked to you about doing this movie?"

And I acknowledged that I had considered doing so. This movie is an incredibly creative concept. He responded, "Whatever it takes, I'll do the movie," upon learning that, as he was in competition. Naturally, the movie descended deeply into vulgarity.