Shortly before Saturday Night hit theaters last October, O'Brien told EW that he had his doubts about his physical ...

Read the reason why Dylan O’Brien had to use fake facial hair instead of his real mustache in the Saturday Night movie.

Actor Dylan O’Brien revealed the careful preparation behind ... though O’Brien revealed that while his facial hair in “Twinless” is real, his mustache for his role as a young Dan Aykroyd ...

Dylan O’Brien opened up about the tough challenge he faced while transforming his looks to resemble Dan Aykroyd’s in Saturday ...

Dylan O'Brien's onscreen looks have only gotten hairier ... When asked if he preferred sporting his own facial hair rather than a fake mustache, O'Brien admitted, "I'm a little biased, but yeah.

"They made me wear a fake one for Aykroyd because they said my hair follicles didn't match Dan Aykroyd's." Related: Dylan O'Brien doesn't remember if he met Dan Aykroyd before playing him in Saturday ...