The Scholars have stated:
أنكحة الكفـار صحيحة يقرون عليهـا إذا أسلموا أو تحاكموا إلينا
“The marriages of the kuffar are regarded as being valid, they should be considered [as legitimate spouses] if they were to embrace Islam or were to seek judgement from us… ”
Translated and Answered by
AbdulFattaah bin Uthman
Abu Fajr