In conclusion, we have developed a metallaphotocatalytic approach for the selective methylation of (hetero)aryl bromides via Ni-catalyzed cross-coupling with DABAl-Me₃. Compared to previous methods, this strategy leverages a commercially available, air-stable aluminum-based reagent and an organophotocatalyst to enable a simplified, fast, and robust procedure that accommodates a broad range of functionalities, delivering clean methylation without protodehalogenation. Furthermore, the advantages of continuous-flow technology offer opportunities for efficient scale-up with improved process metrics. Our mechanistic investigation confirms the unprecedented generation of a methyl radical from an organo-aluminum compound under photoredox conditions. This radical-based approach bypasses the limitations of conventional two-electron pathways and expands the synthetic chemist's toolbox of practical radical precursors.