*** Call for Participation *** The Annual ACM Conference on Intelligent User Interfaces (IUI 2026) July 13-16, 2026, 5* St. Raphael Resort & Marina, Limassol, Cyprus https://iui.hosting.acm.org/2026/ (*** Standard Registration Fee Deadline: June 30, 2026 ***) The 2026 ACM Conference on Intelligent User Interfaces (ACM IUI) is the annual premier venue, where researchers and practitioners meet and discuss state-of-the-art advances at the intersection of Artificial Intelligence (AI) and Human-Computer Interaction (HCI). Ideal IUI submissions should address practical HCI challenges using machine intelligence and discuss both computational and human-centric aspects of such methodologies, techniques and systems. This year we had a record number of submissions, so we have a record number of accepted papers (114), a record number of posters and demos (53) and we hope for a record number of participants. Furthermore, we have 8 workshops and 6 tutorials. Finally, the technical program will feature two keynotes, by Antonio Kruger on the role of HCI in trusted A.I. and Pattie Maes on designing A.I. interaction for human flourishing. The detailed program of IUI 2026 can be found on the conference website: https://iui.acm.org/2026/program/ . The standard fee registration deadline is on June 30th and the registration page is: https://iui.acm.org/2026/registration/ We are looking forward to meeting everybody in Limassol. Organisation General Chairs • Tsvi Kuflik, The University of Haifa, Israel • Styliani Kleanthous, Open University of Cyprus, Cyprus Local Organising Chair • George A. Papadopoulos, University of Cyprus, Cyprus Program Chairs • Li Chen, Hong Kong Baptist University, China • Giulio Jacucci, University of Helsinki, Finland • Alison Renner, Dataminr, USA