My sister Mina and I are Muslims, however, we're not a very religious family. As you can guess, my father is Muslim and my mother's a Catholic.
The official religion in the Moroccan Kingdom is Islam. However, Islam is not as strict there as it is in some countries. So, for example, on Fridays, the day Muslims are supposed go to pray in the mosques (like for Christians on Sundays) fewer and fewer people go nowadays. When the call to prayer comes at the end of the day from the minaret of the mosque (the equivalent would be the bell tower of a church) very few stop doing their ordinary activities to pray. Another example of this more 'liberal' Islam in Morocco is the fact that a growing number of men do not obey the rule against drinking alcohol.
The other thing to mention is that many non-Muslims think that using something to cover the head and perhaps the face too (sometimes called hijab, sometimes called chador) is dictated by religion. This is only partly true. Islam says women should dress modestly and prefers that their heads are covered. Covering the face is a particularly strict tradition. Actually, going back in time, whether you covered the head or wore a veil over your face sometimes depended on whether you were free or a slave. Guess what! Quite the opposite of what most western people could imagine, the women allowed to wear it were the free ones!
Mina only covers her head on special occasions. My father didn't like it much, but finally accepted it. After all we're living in Spain not a Muslim country - over 80% of people are Catholic here.