Tom Hardy has apologised to 'Mad Max: Fury Road' director George Miller for being grumpy on set.

Tom Hardy

Tom Hardy

The 37-year-old actor - who recently watched the post-apocalyptic action film for the first time - has publicly apologised to the director, saying he'd struggled to understand his ambitions for the movie during the filming process.

He said: "I owe George an apology for being so myopic - that was my first thought.

"The most frustrating thing for me or the hardest part of filming was trying to know what George wanted me to do at any given minute on a minute-by-minute basis, so I could fully execute his vision.

"I have to apologise to (George) because I got frustrated and there is no way that George could have explained what he conceived in the sand while we were out there filming."

The actor also admitted that although he knew he was working with a talented director, he didn't quite appreciate "just how brilliant" Miller is until he sat down and watched the finished piece.

The actor added: "Because of the due diligence that was required to make everything safe and to make everything that was incredibly complex so simple, which is what I saw, which is a relentless barrage of complexities simplified in a fairly linear story."