High entropy metallic glasses: Glass formation, crystallization and properties

•The glass forming ability of high entropy metallic glasses (HE-MGs) and strategies to fabricate high entropy bulk metallic glasses (HE-BMGs) has been reviewed and summarized.•The crystallization process and products of HE-MGs and HE-BMGs have been reviewed.•The mechanical properties of HE-BMGs have been reviewed.•The magnetic properties and related parameters have been summarized.