I am a professor in the Department of Computer Science and Engineering at Seoul National University. My research interests are in the areas of computer graphics, animation, biomechanics, and robotics. I am particularly interested in developing new ways of understanding, representing, planning, and simulating human and animal movements. This involves full-body motion analysis and synthesis, biped control and simulation, clinical gait analysis, deep learning, motion capture, motion planning, data-driven and physically based techniques, interactive avatar control, crowd simulation, and controller design. I co-chaired ACM/EG Symposium on Computer Animation (SCA) in 2012, ACM SIGGRAPH conference on Motion, Interaction and Games (MIG) in 2018, and Pacific Graphics in 2019. I will be the technical program chair of SIGGRAPH Asia 2022. I also served on numerous program committees, including ACM SIGGRAPH, ACM SIGGRAPH Asia, Eurographics, ACM/EG Symposium on Computer Animation, Pacific Graphics, CGI, and CASA. I served as an associate editor of IEEE Transactions on Visualization and Computer Graphics. I am leading SNU Movement Research Lab.