Watch Louis C.K. crash an episode of 'Between Two Ferns' with Zach Galifianakis, Brad Pitt

Zach Galifianakis' famously uncomfortable Funny or Die web series, Between Two Ferns, is back to claim a new victim: Brad Pitt.

Galifianakis discusses Pitt's latest movie, "Furry," and inquires about his use of suntan lotion and charity work before Louis C.K. appears for some impromptu comedy. Watch the video below to find out why you shouldn't allow gum on set.

Pitt joins a long list of well-known Between Two Ferns guests, which includes Jon Hamm, Jennifer Lawrence and President Barack Obama.