We have developed a fast, robust, and scalable photocatalytic B-alkyl Suzuki-Miyaura cross-coupling method that overcomes the limitations of previous approaches. Our protocol allows for room temperature reactions, utilizes an inexpensive catalytic system, and can be completed in just a few minutes. By employing alkyl boranes as alkyl fragments, we have addressed the challenge of arylation at primary C(sp 3 ) centers, expanding the synthetic possibilities of this methodology. The straightforward synthesis of alkyl boranes via hydroboration enables greater synthetic creativity and makes our approach particularly suitable for functionalizing biologically relevant alkyl substrates in medicinal chemistry or total synthesis. Notably, our reaction operates through conventional transmetalation rather than alkyl radical formation, distinguishing it from other metallaphotoredox protocols. Furthermore, we have demonstrated the benefits of continuous-flow technology in terms of scalability, modularity, and reliability. In conclusion, our versatile and efficient method for C(sp 3 )-C(sp 2 ) bond formation is poised to find rapid adoption in pharmaceutical route scouting campaigns, offering accelerated drug development opportunities through its inherent modularity and wide