W hat difference do new actors and new institutions make to gender justice outcomes? Do new actors working with new institutions have greater opportunities for advancing change in terms of advancing gender equality? Does a lack of incumbency of actors and the provision of new "formal" codified rules provide a clean slate for advancing gender equality claims? This article explores these questions through an examination of the objectives and influence of "new" international feminist legal actors on the design and implementation of the "new" victims' rights and gender justice provisions contained in the 1998 Rome Statute of the International Criminal Courts (ICC). The article argues that during its first decade in operation, the ICC has produced mixed outcomes for victims, especially of conflict-related sexual violence. While the influence of new actors and new rules has been reflected positively in some areas, there are also signs that "old" informal gender legacies, arising from the temporal context in which the ICC is "nested" are still in operation, and these have combined to undermine and distort I acknowledge the support of the Australian Research Council Future Fellowship scheme [FT0991602] in the writing of this article. I would also like to thank Fiona Mackay, Georgina Waylen, and participants at the Gender and Institutional Change Workshop at Manchester University, November 2013, for their helpful comments on an earlier version of this paper. I also appreciate Emily Waller's assistance in preparing the article.