Marriage law in England and Wales is a historical relic which reflects a bygone age. Successive governments have made a series of progressive but ad hoc reforms, most notably the introduction of civil partnerships and same-sex marriage. However, this has resulted in a legal framework which is complex and controversial, especially in relation to religion. This book provides the first accessible guide to how contemporary marriage law interacts with religion and identifies pressure points in relation to non-religious organisations and unregistered religious marriages. It reveals the need for the consolidation, modernisation and reform of marriage law and sets out proposals for how the transformation of these laws can be achieved.