This article presents a selective overview of studies that have investigated how advanced adult second language (L2) learners process morphologically complex words. The studies reported here have used different kinds of experimental tasks (including speeded grammaticality judgments, lexical decision, and priming) to examine three domains of morphological processing (regular and irregular inflection, derived word forms, and morphosyntactic phenomena) in L2 learners from typologically different first language (L1) backgrounds. The results from these studies demonstrate clear differences between native and nonnative processing in all three domains, indicating that adult L2 learners are less sensitive to morphological structure than native speakers and rely more on lexical storage than on morphological parsing during processing. (Contains 3 tables.)