Praise be to Allaah.
There is nothing wrong
with a woman wearing a white wedding dress on condition that she does not
appear in it in front of men who are not her mahrams, because usually
wedding dresses are adorned and decorated, and we have already stated in the
answer to question no.
39570 that one of the conditions of women’s hijab is that it should not
be an adornment in and of itself.
It is also essential that this dress does not reveal any of
the woman’s charms, even if she is only going to appear in front of women in
it. See question no.
6569 and 34745.
With regard to it being the dress of kaafir women, that is
not the case. Rather many Muslim women nowadays, if not most of them, wear
this kind of dress.
Shaykh Ibn ‘Uthaymeen was asked:
What is the ruling on a woman wearing white for her wedding
as it is known that this is an imitation of the kuffaar?
It is permissible for a woman to wear white so long as it is
not in the same form as men’s clothing. With regard to it being an imitation
of the kuffaar, that is no longer the case, because now all Muslim women
wear such clothes when they are getting married. The ruling depends on
whether the reason for it is present or not. If it is no longer an imitation
of the kuffaar and this has now become something that is common to both
Muslims and kaafirs, then the ruling no longer applies, unless something is
haraam in and of itself and not because it is an imitation of others. Such
things are haraam in all cases.
Majmoo’at As’ilat tahumm al-Mar’ah, p. 92.