US filmmaker Sean Stone, son of Oscar-winning director Oliver Stone, converted to Islam on Tuesday in Iran, where he is making a documentary, he told AFP.

"The conversion to Islam is not abandoning Christianity or Judaism, which I was born with. It means I have accepted Mohammad and other prophets," he said in a brief telephone call from the central Iranian city of Isfahan, where he underwent the ceremony.

Sean Stone's famous father is Jewish, while his mother is Christian.

The 27-year-old filmmaker did not say why he converted.

According to Iran's Fars news agency, Sean Stone had become a Shiite and had chosen to be known by the Muslim first name Ali.

Sean/Ali Stone has acted in minor roles in several of his father's films, and has directed a handful of documentaries.