The Catholic Church requires a dispensation for mixed marriages. The Catholic partys ordinary (typically a bishop) has the authority to grant them. The baptized non-Catholic partner does not have to convert. The non-Catholic partner must be made truly aware of the meaning of the Catholic partys promise.
How long does it take to convert to Catholicism for marriage?
It is a sacramental commitment between you and the church, much like a baptism. The marrying priests archdiocese dictates the requirements of how to be married in a Catholic church. The process can take 6 months to a year and it comes with some general guidelines.
What makes a Catholic marriage invalid?
A marriage may be declared invalid because at least one of the two parties was not free to consent to the marriage or did not fully commit to the marriage.