He may have been on the red carpet to promote new film Trumbo, but Bryan Cranston clearly can never get away from his Breaking Bad association.

The AMC series' leading actor was confronted with a Walter White impersonator on Thursday night, who went to the trouble of growing a goatee and purchasing some very similar glasses to get noticed.

It certainly seemed to stop Bryan in his tracks because he paused for a few photos with the wannabe protagonist.

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Seeing double: Breaking Bad's Bryan Cranston was confronted with a Walter White impersonator on Thursday night at the premiere of his new film Trumbo

Walter, known for his role in producing Class A drug methamphetamine, cultivated quite a distinctive image throughout the five series Netflix must-see.

Just one of his looks, a dark beard, a bold hat and a skinhead haircut, was captured by the enthusiastic superfan who made his way to the front row of onlookers at BFI London.

He, like the many waiting enthusiasts, had a picture that he wanted signing by the former Malcolm In The Middle star and also hung a Canon camera from his neck to make sure he didn't miss his own photo opportunity.

Mirror image: The superfan (left) went to a lot of trouble to capture on of Walter's (right) most iconic looks

Attention to detail: He even brought along a bag of imitation methamphetamine to impersonate the drug dealer character

Deeply dedicated to the role, the fan even brought along his own clear bag of imitation meth, which he proudly held out to the cameras.

In the AMC thriller, Bryan plays a former chemistry teacher known by his clandestine alias Heisenberg, who decides to venture into manufacturing meth.

He resorts to dealing the drug to ensure his family's financial security as a result of his terminal lung cancer diagnosis at the start of the series.

Memorable: In the AMC thriller, Bryan plays a former chemistry teacher known by his clandestine alias Heisenberg, who decides to venture into manufacturing methamphetamine alongside accomplice Aaron Paul as Jesse Pinkman

Man with a plan: He resorts to dealing the drug to ensure his family's financial security after his death

Cranston whipped up quite a fan frenzy on Thursday, though not for his latest big screen role but for the part he concluded in 2013.

Bryan stars as titular character Dalton Trumbo in the 2015 release and stars alongside Helen Mirren and John Goodman.

Trumbo tells the true story of a Hollywood screenwriter in the 1940s who is blacklisted for being a Communist.

Halloween come early: The spectator certainly knew what his Halloween costume would be, already

Is there a mix up? Even Bryan looked baffled by the striking resemblance

Quick selfie: The lookalike didn't waste any time trying to capture a selfie