The papacy is getting even more prestigious for HBO’s The Young Pope, as Coming Soon reports Diane Keaton will be joining director Paolo Sorrentino’s eight-part miniseries. Keaton will play Sister Mary, an American nun living in Vatican City who, we assume, encounters the young Pope at some point. Said young Pope, Pius XIII, will be played by Jude Law, and the series will revolve around him struggling with his strongly conservative beliefs, his compassion for the poor, and this whole thing about whether or not God actually exists—something the Pope should be pretty sure of. Production on The Young Pope is supposed to begin in a few days, and Coming Soon expects more casting announcements to come shortly. We just hope HBO gets someone funny to play God so they can liven up this serious award-baiting drama. Maybe T.J. Miller from Silicon Valley? That’d be pretty funny.