There has been growing media and political awareness of forced marriage in recent years, and individuals in England, Wales and Northern Ireland are now protected by the Forced Marriage (Civil Protection) Act 2007. Victims of forced marriage can experience significant abuse, which may lead to mental health problems. People with severe mental illness or intellectual disability may be at increased risk of forced marriage and more vulnerable to its negative consequences. We review the current literature on forced marriage, focusing on the way it might affect these two groups, touch on its potential mental health consequences and give practical examples of how to manage situations in clinical practice.