7th Heaven star, Stephen Collins is joining the cast of the drama, Blood Diamond with Leonardo DiCaprio, Jennifer Connelly, and director Ed Zwick for Warner Bros.

The story centers on a poor African farmer, played by Djimon Hounsou, who gets caught up in a conflict between an U.S. diamond smuggler (DiCaprio) and the syndicate that controls the local diamond mining industry; Collins plays an ambassador, says The Hollywood Reporter.

Filming is underway in South Africa; Warner has set a release date of January 12 for Blood Diamond.