The International Criminal Court (ICC) turns 18 years old in 2020. As such, we can look back on the Court’s ‘childhood’ and forward to its first year as an adult. Like all childhoods, there have been ups and downs, successes and lessons learned. There have been four final convictions against individuals for crimes against humanity and war crimes, and reparations ordered for hundreds of victims in three cases. There have also been acquittals (most recently of Mr Gbagbo and Mr Ble Goude regarding crimes during post-election violence in Côte d’Ivoire) and cases terminated (such as those in the Kenya situation). The Court has drawn criticism for its lengthy and expensive trials, limited success rate, and faced allegations of politicisation and double-standards. While States continue to ratify the ICC’s Rome Statute (like Kiribati most recently), two States have withdrawn – Burundi and the Philippines. While criticism has, of course, come from those outside the Rome Statute system, in 2019 many of the Court’s greatest supporters raised their own critiques. Given this backdrop, five issues to follow in 2020 include: 1) an independent expert review of the ICC; 2) the election of a new Prosecutor and Judges; 3) investigations in Myanmar/Bangladesh and (potentially) Afghanistan; 4) conclusion of the cases against Mr Ongwen and Mr Ntaganda; and 5) the unexpected.