Immaculate Grid is a curated, niche hobby and collecting community centered on the exchange, completion, and preservation of vintage movie, television, and celebrity card sets—particularly the cardboard trading cards and promotional cards produced from the 1930s through the 1970s. The term also names a long-running, collector-oriented forum and marketplace where enthusiasts document card runs, share research, and trade duplicates to complete “grids” (full series) or build thematic sets. This article explores the origins, practices, cultural significance, and debates surrounding Immaculate Grid collecting.