Sebastian Stan is preparing for a movie that will spark controversy no matter what. The actor stars in " The Apprentice ," where he plays Donald Trump right before the rise of his real estate empire. It's a role that required someone bold and brave, capable of tuning out the conversation to deliver a performance recognizable as Trump, but also its own thing.

Watch Sebastian Stan's first scenes as Donald Trump in 'The Apprentice' trailer WATCH: Sebastian Stan’s official first look as a young Donald Trump In a new interview, Stan opened up about the copious amount of research he did to play Trump and the physical transformation he underwent for the part. In a profile with Variety , Stan showed writer Daniel D'Addario a selfie of himself pouting in front of the mirror, showing him topless and 15 pounds overweight. Stan revealed that he and director Ali Abbasi had a tight schedule to shoot the film.

“How much weight can you gain?” asked Abbasi. D'Addario was shocked by Stan's physical transformation, particularly since he's known for his performances in Marvel films. “You’d be surprised,” said Stan.

“You can gain a lot of weight in two months.” Stan also talked about his preparation for the role, which required him to look at many videos and photos of Trump in order to assimilate and adopt his physicality while keeping things as natural as possible. “I had 130 videos on his physicality on my phone,” said Stan.

“And 562 videos that I had pulled with pictures .