Kutcher, grew up as a Roman Catholic, however converted to Judaism in adulthood. He has visited Israel and studied the Kabbalah. His "No Strings Attached" co-star, Natalie Portman, stated in 2011 that Kutcher "has taught me more about Judaism than I think I have ever learned from anyone else". On trips to Israel, Kutcher visited Kabbalah centers in Tel Aviv and in Tsfat. In 2013, Kutcher remarked, "Israel is near and dear to my heart ... coming to Israel is sort of coming back to the source of creation – trying to get closer to that. And as a creative person, going to the source of creation is really inspiring. And this place has been really inspiring for me – not only on a spiritual level, but also on an artistic and creative level."