Tom Hiddleston reveals Chris Hemsworth punched him full in the face on the set of 'Avengers'

There's no doubt that, of all the romances in the Marvel Cinematic Universe; Tony Stark and Pepper Potts, Steve Rogers and Peggy Carter, there's one couple that has them all beat: Thor and Loki.

Yes, despite their longstanding rivalry, the adoptive brothers (played by Chris Hemsworth and Tom Hiddleston respectively) have an undeniable chemistry when they're together onscreen, and even though they spend most of their time trying to beat each other up, it hasn't stopped fans from interpreting their relationship as a vitriolic bromance - or in the case of fanfiction writers, as weird sexual tension.

However, Tom Hiddleston has recently revealed that some of that animosity might have bled into the real world. After making an appearance on The Late Show with Stephen Colbert, Tom Hiddleston claimed that Hemsworth once punched him in the face while the two were on the set of the original Avengers movie.

The British actor stated: "Fighting Chris Hemsworth, you’re going to lose, let’s face it. On film, it’s all about angles when you’re fighting. So you’re trying to get the angles of the different parts of the choreography to tell the story, but you only have to do it once."

He continued: "There was a scene in Avengers where Thor had to strike Loki across the face and I was wearing the horns, which weigh about 30 pounds. I couldn’t really sell the hit, the smack. So I just said to Chris, ‘I think you should just hit me in the face'. It was a terrible idea. I went down like a stone."

He added: "I suppose, onstage, when you’re doing a fight, you have to do it every night for 100-odd performances. I think if I was being hit in the face by Chris Hemsworth day after day, I don’t know if I would be able to manage that. It wouldn’t be sustainable."

So there you have it: it looks as though the punch was an accident, and there are no hard feelings between the two men. That's pretty lucky; especially considering the fact that Hiddleston is planning on returning to the MCU to play Loki in a new spin-off TV series as part of its phase four plans.