The 25th edition of the Claude Itzykson Conference will take place online on June 2-4, 2021. The topic of this year edition will be “Many-Body Chaos, Scrambling and Thermalization in Interacting Quantum Systems“. Recent years have seen a growth of interest around these subjects, with contributions coming from condensed matter and statistical physics,high-energy theory and mathematical physics. The aim of this workshop is to review the latest theoretical developments and foster an exchange of ideas between these different communities. If you wish to attend, please register before May 24th.