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Charlize Theron has opened up about her awkward relationship with Tom Hardy .

The pair spent nine months filming Mad Max: Fury Road together in 2014 - and by the sounds of things, working with the British stud was no piece of cake.

“From what I hear, he’s not like THAT on every movie - I hear he’s had good experiences,” she told Wall Street Journal Magazine. "Maybe the movie is what it is because we struggled so much with each other, and those characters had to struggle so much with each other. If we were chum-chum, maybe the movie would have been 10 times worse.”

READ MORE:Braless Charlize Theron suffers embarrassing nip slip at premiere in lacy top

Confirming that Charlize, who played Furiosa, and Tom, Max, weren't exactly on friendly terms, the film's director George Miller also discussed what it was like on set with them.

“I’m not saying that they were seething right through, but the trajectory of the characters can’t help but seep into the work,” he said.

Despite not necessarily being the best of friends, after filming wrapped on the Hollywood blockbuster, Tom surprised Charlize with a gift.

The actress was left smiling when he gave her a self-portrait with a note which read: "You are an absolute nightmare, BUT you are also f***ing awesome. I'll kind of miss you. Love, Tommy."

After its release in 2015, Max Max was nominated for 10 Academy Awards and went went on to win six.