Stewart and McKellen are longtime BFFs and frequent collaborators, who recently starred together in a Broadway production of Waiting for Godot and documented their hilarious New York City adventures on social media.
So they should know each other pretty well by now...
In the video below, the two icons of stage and screen stumble adorably through questions about each other's spirit animals and favorite foods.
Notable deaths of 2014 [PHOTOS]
Mindy Kaling mistaken for Malala Yousafzai