Theroux is best known for his BBC series Weird Weekends. He is son of novelist and travel writer Paul Theroux and the cousin of actor Justin Theroux.
In a live chat on the BBC website, the following quote appears:
James Fuller: Do you believe in God?
Louis Theroux: At the risk of sounding trite, life is a mystery. I'm not totally atheistic, but organised religion has no role in my life.
On the BBC Television programme "America's Most Hated Family in Crisis" the following dialogue is spoken:
Steve Drain: Do you wanna hold a sign?
Louis Theroux: It's against my ethics.
Steve Drain: ... Why are you trying to pose a difference between religion and ethics?
Louis Theroux: Because I don't believe in God.