This chapter focuses on group threat theory (Blumer 1958), one of the main sociological approaches used to explain prejudice toward minority groups. It examines the utility of the theory when applied to prejudice in the context of migration-generated diversity and analyzes how its original formulation by Blumer compares with the conceptualization of stigma by Link and Phelan (2001). Similarities and diff erences are drawn between Blumer's "four feelings" in prejudice and Link and Phelan's "four components" constitutive of stigma. Despite overlapping, complementary, and at time divergent arguments, using these two approaches in tandem may overcome the limitations of group threat theory and, in the process, advance research into anti-immigrant sentiment. In turn, it is posited that scholarship on stigma may gain from incorporating the concept of threat into its framework.