A source close to the couple tells TMZ that the main reason for Katie Holmes is divorcing Tom Cruise is because of his deep ties to Scientology.

Sources say that she has never been totally committed to Scientology. While she does have ties to Scientology, the conflict comes to their daughter Suri. Katie does not want Tom to be able to control Suri's choice when it comes to religion.

This is why, according to sources, that Katie is filing for sole custody. Watch the video below to see how intense Tom's involvement in Scientology affects his life and views.