The Sherlock star was cast as the villain in Star Trek 2 in January. In a recent interview with MTV News, he seemingly revealed that he has made no effort to learn about the canon.
"What do they look like?" Cumberbatch asked when questioned about Klingons.
He is widely rumoured to be playing the classic Star Trek villain Khan. When questioned about this, he went on to deny knowing what the SS Botany Bay, Khan's ship, is.
"I think it's best to, like a lot of acting you do, you have to start from a knowledge base of zero in order to have every experience that you're portraying again and again and again feel like fresh," Cumberbatch explained. "So I purposefully made no attempt to learn anything about anything."
The actor revealed that he changed his physique for the unconfirmed role, saying he has gone up by "two suit sizes" as a result.
Watch Benedict Cumberbatch get a Star Trek quiz below: