Accountability for gender-based crimes has been discussed as an important feature of the Women, Peace and Security Agenda. However, too often there has been a significant gap between the ideal of such accountability and its operation. This has been demonstrated over the past decade or so in the operations of the International Criminal Court and other tribunals such as that for conflicts in the former Yugoslavia, Rwanda, Sierra Leone. Interviewing Patricia V. Sellers, leading International Criminal Law Prosecutor and Special Adviser on Gendering the Office of the Prosecutor, ICC this contribution canvasses the challenges of and lessons learned about achieving accountability for gender crimes through international criminal tribunals, the steps forward towards new accountability practices and strategies and for strengthening the relationship between these tribunals and the broader international WPS agenda.