"I never thought we’d get a guy of his stature to wear a period piece wool costume in 90 degree weather for 10 days straight," McBride says of casting his surprise Civil War set final season opener. "And for no money.

Danny McBride on collaborating with his 'Aloha' costar for th ambitious Civil War-themed prologue that opens the show's fourth and final season

I sent him the script and he called me back pretty quickly,” McBride tells PEOPLE before explaining what happened nextBradley Cooper may have needed just a little nudge to sign on to appear in the fourth and final season of The Righteous Gemstones.