The son of the famous director Oliver Stone, Sean Stone publically

 while filming in Iran. He explained:

 “I happen to agree with Mohamed Gandhi said, you know, I’m a — he said, I’m a Hindu, a Jew, a Christian, a Muslim, a Buddhist. And you know, being there, seeing Islam in practice, I — and having read Koran, having studied Islam at Oxford and Princeton both, I just feel that it’s an extension of the Judeo-Christian heritage and Mohamed is a profit in that same line compared (ph) to Abraham. So, why not simply accept it publicly? I stated it publically rather than holding it privately. That’s the only thing that makes me a Muslim, actually.”

So, Stone is not renouncing other faiths but rather affirming the commonality of all faiths, including Islam. It is doubtful that he has recited the shahada.