Matthew McConaughey "needs" to go to church every week.

The 'Interstellar' actor - who has children Levi, six, Vida, four, and Livingston, two,with wife Camila Alves - says the "ritual" is important for him to take stock of his life and understand what he needs to work on.

Asked if he goes to church weekly, he said: "Yeah. In Texas. It's non-denominational. It's based in the faith that Jesus is the son of God, that he died for our sins, but many different denominations come in.

"As soon as we had children, I was like, 'You know what? That was important to my childhood.' Even if it was just for the ritual of giving an hour and a half on Sunday to yourself, to pray and to think about others, even if you're tired or whatever.

"I noticed how much I missed it and needed it. It's a time for me to take inventory of my last week, to look at what's in the future and say my thank-you's and think about what I can work on to do better."

The 44-year-old actor turns to God to help him figure out answers but though he believes in "miracles", he also thinks the world has its roots in science.

Asked who he thinks God is, he told the new issue of America's GQ magazine: "[God is] somebody who can help answer my questions. Someone who has a hand in all of this miracle we call life, which I believe is a miracle. But, see, at the same time, I completely believe in evolution.