Sinéad, 51, singer and songwriter has tweeted that she was 'proud to have become a Muslim'.
She has also changed her name to Shuhada.
The Irish star, who had changed her name to Magda Davitt, has said, 'All scripture study leads to Islam, which makes all other scriptures redundant.'
Umar Al-Qadri, Head of Islamic Centre Ireland, posted a video on his Twitter that shows her saying the Islamic declaration of faith.