INTERSTELLAR study will generate critical prospective real-world evidence on the benefits of adding Anifrolumab to standard of care treatment for SLE in routine clinical practice, to inform physicians, payers and patients. The study will use clinical assessments that are relevant for SLE-treating physicians in routine clinical practice, as well as introduce a specific measure for skin manifestations to affirm the potency of anifrolumab in treating SLE-related skin manifestations. The study will use standardized objectives, inclusion/exclusion criteria and outcome measures across all countries participating in this study including GCC (Qatar, KSA), Mexico, CAMCAR (Costa Rica, Panama, Dominican Republic), Colombia, Argentina, Taiwan, and Egypt, and any other countries that may be included in the study, in order to facilitate a comparison and analysis across all countries included in this study.