Chris Hemsworth refuses to answer 'horrible' question about The Rock whilst under a lie detector

Hollywood star Chris Hemsworth has refused to answer a question about The Rock while hooked up to a lie detector.

The Australian actor is best known for playing Thor in the Marvel Cinematic Universe, though he has also starred in blockbuster films such as Furiosa: A Mad Max Saga, Extraction and Spiderhead to name a few.

Hemsworth has recently made headlines after an old workout video resurfaced, inadvertently showing off his own 'hammer' as social media went wild with the spicy videos.

Thor star Chris Hemsworth refused to answer a question about The Roc. (Eric Charbonneau/Getty Images for Paramount)

But the actor was put under the cosh when he was hooked up to the infamous Vanity Fair lie detector test earlier this year.

The series consists of celebrities coming on and answering some questions with a 'yes' or 'no', while being hooked up to a machine which, apparently, can tell if you're telling the truth or not.

It's a truly entertaining concept, with some hilarious clips and bits coming from it in the past.

In Hemsworth's episode, he was asked a question that he branded as 'horrible', and it had to do with fellow heavyweight, Dwayne 'The Rock' Johnson.

Earlier in the interview, he was asked if he was the favourite child, to which he laughed and answered 'yes', which, to no surprise, was indeed truthful.

The interviewer later spoke to the actor about being an 'action hero' in films, and the actor said: "I'd like to think I'd moored off (rather) than just being an action hero."

They then asked the 41-year-old: "Are you a better action hero than this person?"

While asking, a picture of The Rock was slid across the table, and Hemsworth looked apprehensive from the get go, letting off a little giggle.

He answered: "I don't like answering these things - am I better in what way? What do you mean? What do you mean?

"Hang on, he is a good action hero, he's a great action hero, am I a better action hero?

He refused to answer who the better action hero is. (YouTube/Vanity Fair)

"This is gonna get dissected and pulled apart, he's going to dissect me! I think he's a good action hero, we answered that - who is better, is what I refuse to answer, on the ground that it might incriminate me."

He was then asked if he was a better action hero than another actor, as a photo of Jason Momoa was slid across the table.

The Thor actor answered: "I love him," before lifting up both photos and stating: "Two great action heroes."

"Would I kick both their arses? Yes," Hemsworth joked, as the lie detector deemed the statement as truthful. "That's in real life though, fellas."

Hemsworth was recently given a star on the famous Hollywood Walk of Fame by Marvel co-star Robert Downey Jr, who the Aussie also said was in a group chat with him and the other Avengers stars, which is still active.