A marriage is not considered valid in Islam without at least two witnesses. The presence of witnesses is important in Islam to establish the validity of a marriage contract. These witnesses can be any adult Muslim individuals who are of sound mind and can bear witness to the declaration of the marriage by the bride and groom. In addition to witnesses, a marriage contract is usually signed and a formal declaration of the marriage made in the presence of family members, friends, and community members. However, the presence of witnesses is the most important requirement for a valid Islamic marriage.