The JALCOM editors are grateful for all the support of our many reviewers, and especially those who go above and beyond by providing multiple, thorough, and timely reviews in a single year. Herein we are happy to announce that the following five reviewers that have been selected from the pool of nominees to receive the #ALCOM Best Reviewer Award in 2021. Congratulations to prof. Ladislav Havela from Charles University, Czech Republic, Peter Liaw, from The University of Tennessee, USA, Dmitri Louzguine, Tohoku University, Japan, Yiping Lu, from Dalian University of Technology, China, Mihai Stoica, from ETH Zurich, Switzerland. We are looking forward to working closely with all our reviewers and presenting more high-quality papers to our readers.