LONDON (AP) — Princes William and Harry and their wives, Kate and Meghan, are joining forces to back a text messaging service to help people experiencing mental health problems.

Their Royal Foundation will provide a 3 million-pound ($3.9 million) grant to back the initiative called Shout.

The service is designed to help people with a wide range of problems including suicidal thoughts, relationship issues and bullying.

William said Friday the service "is free to use, anonymous, and operates 24 hours a day, seven days a week" and that the text conversations are handled by volunteers who have received online training and are monitored by a clinical team.

William says 60,000 people have already received help from the service.

Both couples have lobbied for better treatment of mental health issues.