Only if both the parties are Hindus can the marriage take place under the Hindu marriage Act.
The Act applies to :
any person who is Hindu, Buddhist, Jaina or Sikh by religion.
any person who is born to Hindu parents
any person who is not a Muslim Christian, Parsi or Jew, and who is not governed by any other law.
The Act does not apply :
to persons who are Muslims, Christians, Parsis or Jews by religion.
to members of the scheduled tribes coming within the meaning of clause (25) of Article 366 of the Constitution of India unless the Central Government by notice otherwise directs.