Does Fardeen khan a Muslim?

Yes, Fardeen Khan is a Muslim by religion. However they are followers of Sai Baba. They support all religions but do not care about the religion they fall in.

well he has a Muslim name and his father had a Muslim name too but concentrated too much on sai baba, he was very much a bakht of sai baba which isn't really something a Muslims does, you are either Hindu or Muslim, you cant be both, most actors and actresses don't care about their religion as they need support from Muslim and Hindu fans