The Oscar winner travels on his Mexican passport, which can raise questions from officials when travelling to America due to the ongoing tense immigration relationship between the two countries.

Cuaron, who produced a new film called Desierto about a Mexican immigrant entering to the U.S., insists he still runs into problems at the border, but he has a quick way to fix it.

When asked about his thoughts on border control by editors at entertainment website One Room With a View, Cuaron firmly believes it should be done away with completely.

"It's about how money flows," Cuaron explained. "How come money can flow between borders but people can't? I'm allowed to cross borders, as there is this perception that I can bring money into my work. But even me being a 'luxury migrant', it's still difficult for me to travel around with a Mexican passport.

"You know how many hours I've spent in little offices at airports while they go and check all my documents and papers? But things got easier for me after Harry Potter because they all said 'Oh, Harry Potter, come right through'. Though not all of humanity has had the luxury to have been involved in Harry Potter, so it was a game-changer for me. Harry Potter helped me so much with immigration!"

Cuaron directed the third installment of the blockbuster franchise, Harry Potter and the Prisoner of Azkaban.