Double take: β‐Borylallylsilanes have been synthesized by the regioselective silaboration of terminal alkynes followed by palladium‐catalyzed double‐bondmigration of the resulting β‐borylalkenylsilanes (see scheme). The stereoselectivity of the double‐bondmigration can be controlled by additives, thus leading to the stereocomplementary synthesis of (E)‐ and (Z)‐β‐borylallylsilanes.