Christopher Nolan has given a clue to fans desperate to figure out the true ending of Inception

Christopher Nolan is one of the most successful and well-recognised directors of our generation, so it's only natural that he gets questions about his blockbuster titles.

But one of the endings to his films has long kept fans guessing and theorising on social media, despite being 14-years-old.

That's right, I'm talking about the 2010 classic, Inception, and its puzzling ending.

If you don't know what I'm on about, take a look here:

Starring Leonardo DiCaprio, Cillian Murphy and Tom Hardy among others, the film is one of the most iconic titles of the 21st century so far.

At the end of Inception, DiCaprio's character Cobb has completed his task and goes home to his children, but the final shot stays on a spinning totem top as it starts to wobble.

If it continues to spin, he is still dreaming, if it falls, he is in the real world. So which is it?

The ending is open to interpretation, if Nolan is to be believed, though fans think they may have worked it out through subtle details here and there.

However, it's never fully been explained, even after actor Michael Caine claimed that every scene that his character Miles is in is actually real-life, and not a dream.

But now, interviewer Josh Horowitz posed the question to Nolan himself during an episode of the Happy Sad Confused podcast as part of last year's press tour for the director's multiple Oscar-winning film, Oppenheimer.

Horowitz asked: "I'm curious, what's your stock answer when someone comes up to you at Starbucks and asks, 'Christopher what happened at the end of

Inception?'"

The 54-year-old director said that he 'thankfully' hadn't been asked that question in a while, adding: "I went through a phase where the film came out where I was asked it a lot."

Explaining that he could be caught outside a screening where he would be bombarded with questions like that, he answered the question by citing what his wife, Emma Nolan, said.

Fans are still debating about what the ending of the film means (Warner Bros)

"I think it was Emma who sort of pointed out the correct answer really, is that the character, Leo's character, the point of the shot is that the character doesn't care.

"It's not a question I comfortably answer," Nolan admitted.

Horowitz then pointed out that it must be 'nice to be in the pantheon' where endings to films aren't really explained, referencing: "Quentin gets the briefcase at the end of Pulp Fiction, Sophia (Coppola) gets 'what did Bill Murray whisper?'"

Nolan admitted: "It's definitely fun to be part of that great Canon, absolutely."