"X-Men: Days of Future Past" stars James McAvoy and Michael Fassbender were asked to imitate their older counterparts from the film, Sir Patrick Stewart and Sir Ian McKellan - in front of their faces! Watch the video here!

"X-Men: Days of Future Past" stars James McAvoy and Michael Fassbender play the younger versions of Patrick Stewart and Ian McKellan's characters Magneto and Xavier in the box office hit film "X-Men: Days of Future Past."

Yahoo! asked young Magneto to face old Magneto, and young Xavier to face old Xavier, and do impressions of each other, Blastr reports.

"McAvoy's charming refusal to do a classic 'Star Trek' line is particularly amusing, as is Stewart's reaction of pure joy when he hears McAvoy's impression of him," Blastr writes.

Fassbender threw in a bit of Gandalf from "Lord Of The Rings," while Sir Patrick gave McAvoy's Scottish accent a go - how charming!

Michael Fassbender then asks Ian McKellan to do an impression of him.

McKellan responds: "Well not yet, no. I'm working at that. I'm working on the body at the moment, and the bright blue eyes."

"X-Men: Days of Future Past" in currently in theaters. These four cast members will return for the next installment, "X-Men: Apocalypse," which is due out in 2016.